Environment and Sustainable Development — NCERT Class 11 Economics

The relationship is complex and often conflicting: 1. Support — the environment provides raw materials (minerals, timber, water), absorbs waste, and sustains life — all essential for economic activity. 2. Conflict — economic development often degrades the environment — factories pollute air and water, deforestation for agriculture, mining destroys ecosystems. 3. Trade-off — short-term economic gains from exploiting resources often lead to long-term environmental costs (soil erosion, water scarcity, health impacts). 4. Complementarity — sustainable practices (renewable energy, organic farming, eco-tourism) show that development and environment can coexist. 5. The challenge — to find a path where economic growth does not destroy the natural base on which it depends.

Sustainable development is necessary because: 1. Resources are finite — we cannot consume more than the Earth can regenerate or absorb. 2. Environmental degradation hurts the poor most — they depend directly on natural resources. 3. Future generations have an equal right to a healthy planet — current exploitation is intergenerational injustice. 4. Climate change threatens global food security, coastal populations, and weather patterns. 5. Health costs of pollution are enormous — air pollution alone kills over 1.6 million Indians annually. 6. Economic costs — soil erosion reduces farm output, water pollution increases treatment costs, disasters destroy infrastructure.

1. Air pollution — caused by vehicle emissions, industrial smoke, coal-based power plants, crop burning, and construction dust. Delhi, Lucknow, and Patna are among the most polluted cities globally. 2. Water pollution — industrial effluents, untreated sewage, agricultural chemicals (fertilisers, pesticides), and religious offerings contaminate rivers. The Ganga and Yamuna are severely polluted. 3. Soil/Land pollution — chemical fertilisers and pesticides degrade soil; industrial waste and plastic dumping contaminate land; open defecation pollutes soil. 4. Noise pollution — traffic, construction, loudspeakers, and industrial machinery cause hearing loss, stress, and sleep disturbances. 5. Radioactive pollution — nuclear plants, mining, and medical waste; rare but extremely dangerous.

Sustainable development is defined by the Brundtland Commission (1987) as "development that meets the needs of the present without compromising the ability of future generations to meet their own needs."

It has three pillars: 1. Economic sustainability — growth that can be maintained over the long term without depleting resources. 2. Social sustainability — equity, inclusion, and access to basic needs for all sections of society. 3. Environmental sustainability — protecting the natural resource base and avoiding irreversible damage.

Key principles: 1. Use renewable resources at rates that do not exceed their regeneration. 2. Use non-renewable resources judiciously; invest in substitutes. 3. Keep waste and pollution within the environment's absorptive capacity. 4. Ensure equity — the poor should not bear disproportionate environmental costs.

1. Air pollution — 21 of the world's 30 most polluted cities are in India. Vehicular emissions, industrial smoke, stubble burning, and dust cause severe health problems. 2. Water pollution and scarcity — 70% of surface water is contaminated; 600 million Indians face high to extreme water stress. Rivers like Ganga and Yamuna fail to meet drinking water standards. 3. Deforestation — forest cover is about 21% against the target of 33%. Logging, mining, and urban expansion destroy forests. 4. Soil degradation — about 29% of India's land is degraded due to erosion, waterlogging, salinity, and chemical overuse. 5. Biodiversity loss — many species are endangered; habitat destruction from development projects threatens ecosystems. 6. Climate change — India is vulnerable to rising temperatures, erratic monsoons, sea level rise, and extreme weather events. 7. Waste management — cities generate enormous waste; most is dumped in landfills without processing. Plastic pollution is severe. 8. Sanitation — open defecation contaminates water and soil; Swachh Bharat has improved coverage but behaviour change is slow.

1. Vehicular emissions — rapid growth in vehicles (especially diesel); outdated emission norms; traffic congestion increases idling time. 2. Industrial emissions — factories, power plants, and refineries release particulate matter, SO2, NOx, and CO. 3. Coal-based power — India generates about 55% of electricity from coal; thermal plants emit large quantities of fly ash and CO2. 4. Crop residue burning — farmers in Punjab and Haryana burn paddy stubble after harvest; smoke drifts to Delhi, causing severe smog in winter. 5. Construction dust — rapid urban construction generates fine particulate matter (PM2.5, PM10). 6. Domestic fuel — rural and slum households use firewood, dung cakes, and kerosene for cooking, producing indoor air pollution. 7. Geography — in winter, temperature inversions trap pollutants near the ground in northern India, worsening smog.

Global warming is the long-term rise in Earth's average surface temperature caused by increased concentrations of greenhouse gases (CO2, methane, nitrous oxide) from human activities.

Effects on India: 1. Rising temperatures — average temperature has risen by 0.7 degrees C since 1900; heatwaves are more frequent and intense. 2. Erratic monsoon — rainfall patterns are shifting; some regions get excess rain (floods) while others face deficits (droughts). 3. Sea level rise — threatens coastal cities (Mumbai, Chennai, Kolkata) and island territories; millions could be displaced. 4. Glacier retreat — Himalayan glaciers are melting, affecting river flows (Ganga, Brahmaputra, Indus) that feed billions. 5. Agriculture — wheat and rice yields are projected to decline; food security is at risk. 6. Health — spread of vector-borne diseases (malaria, dengue) to new areas as temperatures rise. 7. Extreme weather — cyclones, floods, and droughts are becoming more frequent and severe. 8. Biodiversity — species unable to adapt quickly face extinction; coral reefs are bleaching.

Ozone depletion is the thinning of the ozone layer in the stratosphere, caused by chlorofluorocarbons (CFCs) and other ozone-depleting substances. The ozone layer protects Earth from harmful ultraviolet (UV) radiation.

Consequences: 1. Skin cancer — increased UV-B radiation causes skin cancer and cataracts. 2. Immune suppression — UV weakens the human immune system, increasing susceptibility to infections. 3. Crop damage — UV reduces yields of crops like wheat, rice, and soybeans. 4. Phytoplankton decline — UV harms ocean phytoplankton, the base of the marine food chain. 5. Material degradation — UV accelerates the breakdown of plastics, paints, and rubber.

International response: 1. Montreal Protocol (1987) — phased out CFCs; widely considered the most successful environmental treaty. 2. India's compliance — India has phased out CFC production and is transitioning to HCFCs and natural refrigerants. 3. The ozone layer is slowly recovering; full recovery is expected by 2060-2075.

1. Renewable energy — India aims for 500 GW non-fossil capacity by 2030; solar and wind are growing rapidly. 2. Energy efficiency — Bureau of Energy Efficiency (BEE) standards, LED bulb distribution (UJALA), and star-rating for appliances. 3. Afforestation — National Afforestation Programme; Green India Mission; compensatory afforestation for diverted forest land. 4. Water conservation — Jal Shakti Abhiyan, rainwater harvesting mandates, micro-irrigation (drip, sprinkler). 5. Waste management — Swachh Bharat Mission, waste segregation rules (2016), plastic ban in many states. 6. Clean transport — BS-VI emission norms (2020), metro rail expansion, electric vehicle (EV) push, FAME scheme. 7. Organic farming — Paramparagat Krishi Vikas Yojana; reduces chemical use and improves soil health. 8. Sustainable cities — Smart Cities Mission, AMRUT (urban transformation), green building standards. 9. Climate commitments — Paris Agreement targets: reduce emission intensity by 45% by 2030 (from 2005 levels); achieve net zero by 2070. 10. Community participation — Joint Forest Management, watershed committees, and self-help groups involve local communities in conservation.

The Chipko Movement was a forest conservation movement that began in 1973 in Reni village, Chamoli district, Uttarakhand (then part of UP).

Key features: 1. Villagers hugged (chipko = to hug) trees to prevent contractors from cutting them. 2. Led by Sunderlal Bahuguna and Chandi Prasad Bhatt. 3. It was a non-violent, people's movement — women played a leading role. 4. It highlighted the link between deforestation, floods, and erosion in the Himalayas. 5. It led to a 15-year ban on commercial felling in the Himalayan states.

Significance: 1. It showed that local communities are the best custodians of forests. 2. It inspired similar movements across India (Appiko in Karnataka, Save Silent Valley in Kerala). 3. It forced the government to reconsider forest policy and involve communities in forest management. 4. It demonstrated that environmental protection and people's livelihoods are linked — forests provide fuel, fodder, and water to rural communities.

1. Legislation — Environment Protection Act (1986), Water Act (1974), Air Act (1981), Forest Conservation Act (1980), Wildlife Protection Act (1972). 2. Regulatory bodies — Central Pollution Control Board (CPCB), State Pollution Control Boards, National Green Tribunal (2010). 3. Environmental Impact Assessment (EIA) — mandatory for large projects; assesses environmental damage before approval. 4. National missions — National Action Plan on Climate Change with 8 missions (solar, energy efficiency, water, Himalayas, green India, sustainable agriculture, habitat, strategic knowledge). 5. International commitments — Paris Agreement, Montreal Protocol, Convention on Biological Diversity, UNFCCC. 6. Subsidies and incentives — subsidy for solar panels, electric vehicles, organic farming, and LPG (Ujjwala). 7. Criticism — enforcement is weak; EIA is often a formality; polluting industries are rarely shut; environmental clearances are given to powerful interests; tribal and forest-dweller rights are violated.

The United Nations Conference on Environment and Development (Rio Earth Summit, 1992) was the largest gathering of world leaders to address environmental issues.

Significance: 1. It established sustainable development as a global priority. 2. Agenda 21 — a comprehensive action plan for sustainable development in the 21st century was adopted. 3. UNFCCC — the United Nations Framework Convention on Climate Change was opened for signature, leading to the Kyoto Protocol and Paris Agreement. 4. CBD — Convention on Biological Diversity was adopted to conserve biodiversity. 5. It recognised that developed countries bear greater responsibility for environmental damage (common but differentiated responsibilities). 6. It linked environment and development — poverty eradication and environmental protection must go together. 7. It led to national-level action plans in many countries, including India.

1. Reduce, Reuse, Recycle — minimise waste generation; segregate waste; compost organic waste. 2. Energy conservation — use LED bulbs, switch off appliances when not in use, use public transport. 3. Water conservation — fix leaks, use buckets instead of showers, harvest rainwater, avoid running taps. 4. Sustainable consumption — buy local and seasonal produce; avoid single-use plastic; choose durable over disposable. 5. Green transport — walk, cycle, carpool, or use public transport; consider electric vehicles. 5. Tree planting — participate in afforestation drives; maintain green spaces. 6. Awareness — educate oneself and others about environmental issues; support conservation organisations. 7. Advocacy — demand accountability from industries and government; participate in public consultations for EIAs. 8. Sustainable food — reduce food waste; eat less meat (livestock produces methane); support organic farming.