2.8 — MINERAL RESOURCES AND MINING
Environment → Environment → Environmental Fundamentals → Environmental Fundamentals → Natural Resources | Author: admin | Sep 07, 2026
1. Introduction and Lithospheric Foundations
The Functional Concept of Resources
As established by the resource economist Erich Zimmermann, physical substances are not static; rather, “Resources are not, they become”. A geological material remains a mere physical asset until human knowledge, economic demand, and technological capability transform it into an active resource. For instance, radioactive pitchblende was of little consequence until the dawn of nuclear physics, which transformed it into a highly valuable source of atomic energy.
Lithospheric Chemistry and Geochemical Abundances
The lithosphere represents the solid outer crust of our planet, which cooled from a molten ball of matter approximately 4.6 billion years ago. The continental crust is thin—averaging only 6 to 7 kilometers beneath the oceans and stretching thicker under the continents.
Of the 92 naturally occurring elements in the lithosphere, only eight make up approximately 98% to 99% of the Earth's crust by weight:
GEOCHEMICAL ABUNDANCE IN EARTH'S CRUST
Element Weight % of Crustal Rocks
───────────────────────────────────────────────
Oxygen (O) ████████─────────── 47%
Silicon (Si) ██████───────────── 28%
Aluminium (Al) ██────────────────── 8%
Iron (Fe) █─────────────────── 5%
Sodium (Na) ──────────────────── 4%
Magnesium (Mg) ──────────────────── 4%
Potassium (K) ──────────────────── 4%
Calcium (Ca) ──────────────────── 4%
These eight elements combine to form approximately 200 common mineral compounds. Physical and chemical weathering breaks down these mineral-rich rocks over thousands of years to produce the fertile soils that sustain global agriculture and support terrestrial life.
Core Definitions
- Mineral: A naturally occurring, inorganic, crystalline solid with a definite chemical composition (or range of compositions) and distinct physical properties (such as color, hardness, luster, and cleavage). Currently, over 3,000 distinct mineral species are recognized globally.
- Ore: A naturally occurring rock or mineral deposit that contains a sufficiently high concentration of a valuable element (typically a metal) to make its extraction and chemical purification commercially profitable.
- Mineral Deposit: A localized geographical concentration of minerals or ores formed through slow geochemical processes over millions of years.
2. Classification of Mineral Resources
Mineral resources are non-renewable, exhaustible assets that form a closed system within the lithosphere. Once extracted and consumed, they cannot replenish themselves on a human timescale. Environmental scientists and the U.S. Geological Survey (USGS) classify these finite resources based on their chemistry, physical properties, and geological certainty:
┌───────────────────────────┐
│ MINERAL RESOURCE MATRIX │
└─────────────┬─────────────┘
│
┌───────────────────────────────────┼───────────────────────────────────┐
▼ ▼ ▼
┌───────────────┐ ┌───────────────┐ ┌───────────────┐
│ 1. METALLIC │ │2. NON-METALLIC│ │ 3. ATOMIC │
│ MINERALS │ │ MINERALS │ │ MINERALS │
├───────────────┤ ├───────────────┤ ├───────────────┤
│Ores yielding │ │Industrial │ │Radioactive │
│pure, malleable│ │substances & │ │isotopes for │
│metals. │ │building stone.│ │fission energy.│
│(e.g., Fe, Al, │ │(e.g., Silica, │ │(e.g., Uranium,│
│ Cu, Zn, Pb) │ │ Mica, Gypsum) │ │ Thorium) │
└───────────────┘ └───────────────┘ └───────────────┘
A. Metallic Minerals
These are minerals from which malleable and ductile metals can be extracted. They are divided into:
- Precious Metals: Gold (Au), Silver (Ag), and Platinum (Pt) group metals, prized for their high corrosion resistance, conductivity, and ornamental value.
- Steel Industry (Ferro-alloy) Metals: Iron (Fe), Nickel (Ni), Cobalt (Co), Titanium (Ti), Vanadium (V), Chromium (Cr), and Molybdenum (Mo), utilized to manufacture high-strength structural alloys.
- Base Metals: Highly utilized industrial metals, including Copper (Cu), Lead (Pb), Tin (Sn), Zinc (Zn), and light metals like Aluminium (Al) and Magnesium (Mg).
- Specialty Metals: Lithium (Li), Germanium (Ge), Gallium (Ga), and Arsenic (As), critical for modern micro-electronics, semi-conductors, and electric vehicle battery systems.
B. Non-Metallic Minerals
These represent non-metal mineral compounds, which do not produce malleable metals upon smelting:
- Industrial Minerals: Highly valued for their chemical and physical properties. Examples include Quartz (silica), Rock Salt, Potash, Asbestos (used for fire-resistant insulation), Feldspar, Gypsum, Sulfur, and Rock Phosphates.
- Dimension and Building Stones: Crystalline rocks harvested for construction and architecture, including Granite, Marble, Limestone, Clay, Slate, Sand, and Gravel.
C. Atomic (Nuclear) Minerals
These are heavy, unstable radioactive elements found in minerals like Pitchblende and monazite sands. They include Uranium (U-235/U-238), Radium (Ra), and Thorium (Th), which undergo nuclear fission to release massive amounts of energy.
D. Non-Renewable Hydrocarbons (Fossil Fuels)
Though chemically organic and derived from ancient, fossilized prehistoric plants and marine organisms, fuels like Coal, Crude Petroleum Oil, and Natural Gas are extracted from the lithosphere, making them geological mineral resources.
E. Recyclability Classification (Under Non-Renewable Resources)
Minerals can also be categorized by whether we can reuse their physical atoms after their initial consumption:
- Recyclable Non-Renewables: Non-energy metallic minerals (such as scrap copper, aluminium, and iron) that can be collected, melted down, and reformed into new products without losing their structural integrity.
- Non-Recyclable Non-Renewables: Chemical energy fuels (such as Coal, Petroleum, and Uranium) that undergo permanent chemical transformations during combustion or fission. Governed by the Second Law of Thermodynamics, their high-grade chemical energy disperses into low-grade, unavailable heat and chemical waste (ash, greenhouse gases) that cannot be chemically reconstituted on a human scale.
3. The Lifecycle of a Mine
Extracting minerals from the lithosphere involves five distinct engineering stages:
1. PROSPECTING ──► 2. EXPLORATION ──► 3. DEVELOPMENT ──► 4. EXPLOITATION ──► 5. RESTORATION
(Searching for (Assessing size, (Constructing (Active mining (Reclaiming &
deposits using grade, and value access roads & & processing re-vegetating
satellite GIS) of the ore-body) shafts to ore) of minerals) mined-out land)
- Prospecting: Searching for mineral deposits. Historically done by manual search along exposed rock veins. Modern prospecting relies on geologists, geophysicists, and geochemists utilizing sophisticated technologies, including satellite remote sensing, Geographic Information Systems (GIS), and magnetometers to map subsurface geological anomalies.
- Exploration: Assessing the exact size, shape, location, depth, and economic value of the discovered mineral deposit. Drill cores are extracted to determine the average "grade" (concentration) of the ore.
- Development: Constructing access routes to the deposit. This involves building heavy transport roads, rail links, high-tension power lines, and drilling shafts or tunnels to reach deep underground ores.
- Exploitation: The active extraction of minerals or coal from the earth. Mining methods depend on the depth of the deposit:
- Surface Mining (Open-cast, strip mining, dredging): Used for shallow deposits. It strips away overlying vegetation and topsoil using giant draglines and dumpers. Surface mining has a massive land footprint (stressing over 80,000 hectares in India alone) but is economically cheaper and safer for workers.
- Underground Mining (Deep shaft, room-and-pillar, block caving): Used to extract deep mineral veins. It uses vertical shafts and horizontal tunnels to reach deep ore deposits, minimizing the surface footprint but presenting extreme safety risks.
- Rat-Hole Mining: An unscientific, manual mining method where workers dig narrow horizontal tunnels into steep hillsides to extract thin coal seams. This method is common in Northeast India (Meghalaya) and was banned by the National Green Tribunal (NGT) in 2014 due to high environmental damage and frequent worker deaths.
- Restoration/Reclamation: Returning mined-out lands to a stable, safe, and natural state by backfilling pits, replacing topsoil, and replanting native vegetation.
4. Environmental Impacts of Mineral Extraction and Smelting
Mining has been called a "robbery" or "extractive" industry because it takes assets from the Earth without natural replacement. The environmental consequences are widespread, affecting the land, water, air, and public health.
┌───────────────────────────┐
│CONSEQUENCES OF MINING │
└─────────────┬─────────────┘
│
┌─────────────────────────────────┼─────────────────────────────────┐
▼ ▼ ▼
┌───────────────┐ ┌───────────────┐ ┌───────────────┐
│1. DEVEGETATION│ │2. WATER HAZARD│ │3. GEOPHYSICAL │
├───────────────┤ ├───────────────┤ ├───────────────┤
│Strips forests;│ │Acid Mine Drain│ │Ground subsid- │
│erodes topsoil;│ │age contamin- │ │ence; underground│
│destroys rich │ │ates surface & │ │fires; blasting│
│biodiversity. │ │ground water. │ │shocks. │
└───────────────┘ └───────────────┘ └───────────────┘
A. Devegetation and Habitat Fragmentation
- The Problem: Large-scale open-cast mining requires stripping away all surface forests and topsoil. This causes severe soil erosion and destroys habitats in highly biodiverse zones, including India's Western Ghats, West Bengal, Odisha, and Jharkhand.
- The Siltation Loop: Unconsolidated waste rock piles (overburden) erode during heavy monsoons, carrying fine sediments downstream. This siltation chokes river channels, clogs municipal water filters, and smothers sensitive aquatic species and coral reefs.
B. Hydrological Disruption and Acid Mine Drainage (AMD)
- Acid Rock Drainage / Acid Mine Drainage (AMD):
- Simple Explanation: When sulfide-rich minerals (such as pyrite or fool's gold) deep inside the Earth are exposed to air and water during mining, they react to produce sulfuric acid. This acidic runoff dissolves and leaches toxic heavy metals out of the surrounding rock, contaminating local streams and groundwater.
- Scientific Explanation: Microbial oxidation of sulfur impurities (primarily pyrite, \(FeS_2\)) in exposed ores converts sulfur into sulfuric acid (\(H_2SO_4\)). The resulting highly acidic mine water leaches soluble, toxic heavy metals (such as Lead, Cadmium, Nickel, Arsenic, and Mercury) into local rivers and aquifers. This creates toxic, highly acidic conditions that kill aquatic life and render water supplies unsafe for consumption.
- Cone of Depression: When mining excavations dig below the natural groundwater level, miners must continuously pump out water to keep the shafts dry. This massive pumping acts like a giant straw, creating a cone of depression in the water table that dries up domestic wells, spring systems, and agricultural lands for kilometers around the mine.
C. Geophysical Degradation: Subsidence and Underground Fires
- Ground Subsidence: Underground mining creates massive subsurface voids. If the rock pillars or roof supports collapse, the overlying ground sinks (subsidence), causing structural cracks in buildings, buckling roads, bending railway tracks, and fracturing underground gas pipelines.
- Spontaneous Combustion: Coal seams exposed to atmospheric oxygen during mining are highly vulnerable to spontaneous combustion, sparking underground fires that can burn uncontrollably for decades.
D. Air and Smelting Pollution
- Smelting & Roasting: Extracting pure metal from ores requires high-heat chemical processing. Smelting releases immense quantities of toxic air pollutants, including sulfur dioxide (\(SO_2\), a primary cause of acid rain), carbon monoxide (CO), soot, and particulate matter containing carcinogenic heavy metals like Arsenic, Cadmium, and Lead.
- Gaseous Losses: Coal mining releases trapped Methane (\(CH_4\)) directly into the atmosphere, a greenhouse gas with a global warming potential 28 times greater than carbon dioxide (\(CO_2\)).
E. Occupational Health Hazards and Diseases
Mining is a highly hazardous occupation. Miners are exposed to chronic, long-term health risks:
- Silicosis: A debilitating, incurable lung disease caused by breathing in fine crystalline silica dust generated during quartz, granite, and sandstone quarrying.
- Pneumoconiosis (Black Lung Disease): Chronic lung damage caused by breathing in fine coal dust over many years.
- Asbestosis: Severe lung scarring and cancer caused by breathing in asbestos fibers.
- Radiation Hazard: Miners in Uranium mines (such as Jaduguda) face high exposure to radon gas and ionizing radiation, which can cause lung cancer and genetic mutations in offspring.
5. High-Yield Case Studies of Mining Disasters
To understand the real-world ecological costs of mineral extraction, we must examine eight critical case studies:
Case Study 1: The Sariska Tiger Reserve Mine Row (Rajasthan)
- The Conflict: The Rajasthan Forest Department leased land for open-cast marble and limestone mining directly inside the Sariska Tiger Reserve by de-notifying protected forest areas. Over 70 mines operated in close proximity to the reserve, causing severe forest destruction and disturbing wildlife.
- Judicial Intervention: Local communities, led by Rajendra Singh of Tarun Bharat Sangh (TBS), fought the mining lobby, filing a Public Interest Litigation (PIL) in the Supreme Court in 1991. In a landmark ruling, the Supreme Court held that the Forest (Conservation) Act of 1980 does not permit mining in forest areas. The Court ordered all mining operations in the area to be permanently shut down, stating that the permanent assets of mankind are not to be exhausted in a single generation.
Case Study 2: Jharia Coal Fires (Jharkhand)
- The Conflict: Located in Jharia, Jharkhand, this is one of India's largest coal fields. Uncontrolled underground coal fires have burned since 1916 due to spontaneous combustion in shallow, abandoned open-cast mines.
- Impact: The fires have consumed millions of tons of high-grade coal, releasing toxic gases (carbon monoxide, sulfur dioxide) and causing widespread ground subsidence. This has forced the relocation of thousands of local tribal and coal-mining families, creating a long-term social and environmental crisis.
Case Study 3: Sukinda Chromite Mines (Odisha)
- The Conflict: Sukinda valley contains over 97% of India's chromite ore deposits. Unscientific, open-cast mining has generated millions of tons of untreated waste rock.
- Impact: Rainwater leaches highly toxic hexavalent chromium (\(Cr^{6+}\)) from the waste dumps into the Damsala River, a major tributary of the Brahmani River. Hexavalent chromium is a potent carcinogen, causing severe skin diseases, birth defects, and systemic cancers in the local population.
Case Study 4: Kudremukh Iron Ore Mines (Karnataka)
- The Conflict: The public sector Kudremukh Iron Ore Company Limited (KIOCL) operated a massive open-cast iron ore mine inside the Kudremukh National Park, located in the high-rainfall, evergreen forests of the Western Ghats (an Ecologically Sensitive Area).
- Impact: Mining generated millions of tons of fine iron ore tailings, which polluted the Bhadra River, silted up downstream reservoirs, and threatened unique aquatic and terrestrial biodiversity. Following intense protests by environmentalists, the Supreme Court ordered mining operations to stop by 2005.
Case Study 5: The Aravalli Hills Mining Ban (Rajasthan & Haryana)
- The Conflict: The Aravalli range acts as a critical climatic barrier, blocking the spread of the Thar Desert toward the fertile plains of Punjab, Haryana, and Delhi. Rich in Talc, Marble, and Granite, the range was heavily mined, with over 9,700 industrial mining units operating in Rajasthan alone.
- Impact: Deforestation cleared over 90% of the historical forest cover. As mines dug below the water table, they created a massive cone of depression, drying up local wells and agricultural lands. This degraded the region's natural groundwater recharge capacity, dried up streams, and accelerated desertification.
- Judicial Ruling: In November 2002, the Supreme Court imposed a blanket ban on all mining activities in the Aravalli hills of Rajasthan and Haryana, closing all 9,700 illegal units. In 2025, the Court issued a ruling pausing new leases to protect the fragile desert barrier.
Case Study 6: Jaduguda Uranium Mines (Jharkhand)
- The Conflict: Managed by the Uranium Corporation of India Limited (UCIL), these mines extract uranium ore for India's nuclear power reactors.
- Impact: Poor management of radioactive tailing ponds has exposed local tribal communities to hazardous ionizing radiation. This has led to high rates of congenital deformities, cancers, and reproductive failures among nearby villagers.
Case Study 7: Baia Mare Cyanide Spill (Romania, Europe, 2000)
- The Conflict: Gold processing utilizes toxic Sodium Cyanide to dissolve and extract gold from crushed ore. In January 2000, a tailing dam at the Baia Mare gold mine burst, releasing 80 million liters of cyanide-contaminated water into the Tisza River.
- Impact: The toxic plume traveled over 500 kilometers through Romania, Hungary, and Serbia, killing thousands of tons of fish, contaminating drinking water for millions of people, and devastating riverine ecosystems.
Case Study 8: North-Eastern Coal Fields (Assam)
- The Conflict: The coal seams of upper Assam contain very high concentrations of sulfur (exceeding 3% to 5%).
- Impact: Rainwater reacting with the sulfur-rich waste dumps generates high levels of Acid Mine Drainage (AMD). This acidic runoff has turned local groundwater acidic, ruined agricultural fields, and severely impacted local drinking water quality.
6. Mineral Conservation & Sustainable Mining Solutions
Because mineral resources exist in finite quantities, sustainable development requires shifting from linear consumption to a circular economy.
A. The Green re-processing of Waste (The Circular Economy)
- Copper Slag Re-use: Copper smelting generates a dense byproduct called copper slag. Instead of dumping this waste, slag can be utilized as a durable abrasive for sandblasting, a raw material for cement clinker, or as a coarse aggregate in road construction, reducing the demand for fresh stone and sand.
- E-Waste Urban Mining: Electronic waste (e-waste) contains rich concentrations of precious and strategic metals (Gold, Silver, Copper, Platinum, Lithium, and Cobalt). Recovering these metals through urban mining reduces the need for destructive, energy-intensive primary mining.
- The Economic Scale: At the Paryavaran NITI Manthan (2025), policymakers noted that India loses recoverable metals worth nearly ₹51,000 crore annually due to poor e-waste recycling and weak Extended Producer Responsibility (EPR) implementation.
B. Technical Remedial and Mitigative Measures
- Enhanced Rock Weathering (ERW): Spreading finely ground, fast-weathering rocks like basalt over agricultural lands. Basalt dust reacts with rainwater to capture and store carbon dioxide (carbon sequestration) while increasing soil alkalinity, helping to neutralize acidic agricultural soils and mine runoff.
- Dust and Noise Mitigation: Mining companies must install advanced dust extractors, optimize blasting patterns to reduce ground vibrations, maintain haul roads, and use soundproof generators to control noise and air pollution.
C. Regulatory Frameworks: EIA and the Strategic Mineral Dispute
In India, the Environmental Impact Assessment (EIA) Notification, 2006 (under the Environment Protection Act, 1986) serves as the primary tool to evaluate the environmental costs of mining projects before granting clearance.
- The Two-Tier Clearance System: Projects are divided into:
- Category A: Appraised by the central Expert Appraisal Committee (EAC) under the MoEFCC.
- Category B: Appraised by the State Environment Impact Assessment Authorities (SEIAA).
- The Public Consultation Exemption Controversy:
- The Policy: In September 2025, the MoEFCC exempted mining projects involving Atomic, Critical, and Strategic minerals (such as Lithium, Cobalt, and Rare Earth Elements) from mandatory public consultation under the EIA, 2006.
- The Rationale: To strengthen national security, attract private investment, and ensure the domestic availability of critical minerals for clean technologies (such as EV batteries), reducing import dependence.
- The Concerns: Environmentalists argue that this exemption weakens environmental safeguards, limits public participation, and could lead to unchecked habitat destruction in fragile areas.
🚀 QUICK REVISION
- Earth's Crust Composition: Dominated by Oxygen (47%) and Silicon (28%). These two elements, combined with Aluminium and Iron, form the basis of the lithosphere's mineral compounds.
- The Mining Lifecycle: Progresses through five stages: Prospecting, Exploration, Development, Exploitation, and Restoration. Modern prospecting relies on satellite GIS and geophysics.
- Surface vs. Underground Mining: Surface mining has a larger land footprint (with over 80,000 hectares under stress in India) but is safer and cheaper. Underground mining is more hazardous, presenting risks of rockfalls, methane explosions, and ground subsidence.
- Acid Mine Drainage (AMD): Pyrite (sulfur) exposed during mining is oxidized by microbial action to form sulfuric acid, leaching toxic heavy metals into nearby water resources.
- Occupational Diseases: Miners face chronic health risks, including Silicosis (from quartz dust), Black Lung (from coal dust), and radiation exposure in Uranium mines.
- High-Yield Cases:
- Sariska (Rajasthan): Marble mining inside the tiger reserve was banned by the SC in 1991.
- Sukinda (Odisha): Hexavalent chromium (Cr6+) contaminated local rivers, creating a major public health hazard.
- Aravallis: Excessive mining lowered the water table, creating a cone of depression that dried local wells and accelerated desertification.
- Jharia (Jharkhand): Underground coal fires caused ground subsidence and forced massive human displacement.
- E-Waste Recycling Opportunity: India loses approximately ₹51,000 crore annually in unrecovered metals (Gold, Silver, Lithium, Cobalt) due to poor e-waste recycling and weak EPR implementation.
🗺️ CONCEPTUAL MENTAL MAP
[LITHOSPHERIC MINERAL CAPITAL]
│
┌────────────────────────────┴────────────────────────────┐
▼ ▼
[Metallic Ores] [Non-Metallic / Stones]
• Precious (Au, Ag, Pt) • Industrial (Asbestos, Potash)
• Ferro-Alloys (Fe, Cr, Ni, Mo) • Dimension Stones (Granite, Marble)
• Base Metals (Cu, Pb, Zn, Al) • Mineral Hydrocarbons (Coal, Oil)
│ │
└────────────────────────────┬────────────────────────────┘
│
▼
[The Extraction Stages]
Prospecting ──► Exploration ──► Development ──► Exploitation
│
▼
[Environmental Side Effects]
┌────────────────────────────┼────────────────────────────┐
▼ ▼ ▼
[Atmospheric] [Hydrological] [Lithospheric]
• Smelting SO2/Acid Rain • Acid Mine Drainage • Ground Subsidence
• Coal Methane Releases • Cone of Depression • Topsoil Loss (80k ha)
• Silicosis / Black Lung • Toxic Heavy Metal Leach • Slag Waste Accumulation
│ │ │
└────────────────────────────┴────────────────────────────┘
│
▼
[Sustainable Circular Solutions]
• Copper Slag Re-use (aggregates in road construction)
• E-Waste Urban Mining (recovering lithium, cobalt, gold)
• Mandatory EIA 2006 (Category A & B screening)
• Graded Aravalli scientific mining plans (ICFRE)
🔥 MUST REMEMBER (HIGH-YIELD POINTS)
- Minerals are Abiotic resources. They are non-renewable and form a closed system within the Earth's crust.
- Oxygen is the most abundant element in the Earth's crust (47%), followed by Silicon (28%).
- Fossil fuels are Biotic resources because they originate from the carbon-rich remains of ancient prehistoric forests and marine plankton.
- Aluminium is the "green metal" because recycling aluminium scrap consumes only 5% of the energy needed to mine and refine fresh bauxite ore.
- A 1-meter drop in global groundwater levels (such as from mine dewatering) increases India's total carbon emissions by over 1% due to the extra energy needed to pump water.
- The Pyrite Oxidation reaction converts sulfur impurities in ores into sulfuric acid, leaching toxic heavy metals into nearby water resources.
- Hexavalent Chromium (Cr6+) is a toxic and carcinogenic pollutant released from the Sukinda Chromite Mines in Odisha.
- The 1991 Sariska Tiger Reserve case saw the Supreme Court ban all limestone and marble mining inside the sanctuary to protect the forest ecosystem.
- The National Critical Mineral Mission (NCMM, 2025) is a ₹1,500 crore incentive scheme designed to boost e-waste recycling and secure critical mineral supplies like lithium and cobalt.
- The Public Trust Doctrine (from M.C. Mehta v. Kamal Nath) holds that natural resources like rivers, forests, and minerals belong to the public and the State acts as their trustee.
📌 KEY TERMS
- Mineral: A naturally occurring, inorganic, crystalline solid with a definite chemical composition and distinct physical properties.
- Ore: A rock or mineral deposit containing a high enough concentration of an element to make its extraction commercially profitable.
- Surface Mining: Mining shallow deposits by stripping away overlying vegetation and topsoil.
- Underground Mining: Mining deep deposits through vertical shafts and horizontal tunnels.
- Rat-Hole Mining: An unscientific, manual mining method involving narrow horizontal tunnels, banned by the NGT in 2014.
- Acid Mine Drainage (AMD): Acidic runoff generated when sulfide minerals exposed during mining oxidize, leaching toxic heavy metals into nearby water resources.
- Cone of Depression: A depression in the water table caused by heavy pumping to dewater mines, which can dry nearby wells and agricultural lands.
- Ground Subsidence: The sinking of the land surface caused by the compaction of underground cavities after mining.
- Silicosis: An occupational lung disease caused by breathing in fine crystalline silica dust during quarrying.
- Extended Producer Responsibility (EPR): A policy approach that legally obligates manufacturers to manage and recycle their products at the end of their lifecycle.
🎯 1-LINE BITS (OBJECTIVE EXAM ACCELERATORS)
- Only 3% of the Earth's water is freshwater, and only 1% of that is directly usable in liquid form.
- India houses 18% of the world's population but has access to only 4% of global freshwater resources.
- India is the 5th largest producer of coal in the world, with large reserves located in central and eastern states.
- Oxygen (47%) and Silicon (28%) are the two most abundant elements in the Earth's lithospheric crust.
- Methemoglobinemia (Blue Baby Syndrome) is caused by drinking water with nitrate levels exceeding 45 mg/L.
- Skeletal fluorosis (Knock-Knee Syndrome) is a geogenic waterborne disease caused by fluoride levels exceeding 1.5 mg/L.
- The Central Ground Water Authority (CGWA) was established under the Environment (Protection) Act, 1986.
- Uranium-235 is non-renewable and cannot be recycled, but contains exceptional energy density compared to traditional fuels.
- The Pyrite Oxidation Thesis explains how mining dewatering exposes pyrites to oxygen, generating sulfuric acid and leaching metals.
- Eucalyptus trees are classified as an "ecological hazard" in dry areas due to their high water consumption, which lowers the local water table.
- The Ken-Betwa River Interlinking Project has faced criticism for submerging core areas of the Panna Tiger Reserve.
- The Farakka Barrage remains a source of transboundary water disputes between India and Bangladesh.
- Drip irrigation improves water use efficiency by 95% by delivering water directly to plant roots.
- The Montreux Record is a register under the Ramsar Convention listing threatened wetland sites of ecological importance.
- The Wildlife (Protection) Act of India was passed in the year 1972.
- The Forest (Conservation) Act of India was enacted in the year 1980.
- The Biological Diversity Act of India was passed by Parliament in the year 2002.
- The National Green Tribunal (NGT) was established in 2010 to expedite environmental and forest conservation cases.
- The Sukinda Chromite Mines in Odisha are a major source of hexavalent chromium (Cr6+) contamination in nearby rivers.
- The Baia Mare gold mine disaster (2000) in Romania released 80 million liters of cyanide-laden water, devastating aquatic life for 500 km downstream.