Environment Notes

Foundational concepts of environment, ecology, and ecosystems covering definitions, conditions for an ecosystem, trophic structure, standing crop, food chains, and ecosystem functions including energy flow, nutrient cycling, and productivity

Understanding biodiversity at three levels, genetic, species, and ecosystem, along with key environmental concepts, and the distinct ecological roles species play as keystone, umbrella, foundation, indicator, and flagship species

Why Earth is losing species at an unprecedented rate, the key drivers of biodiversity loss including habitat destruction, fragmentation, human-wildlife conflict, climate change, overexploitation, pollution, and invasive alien species, and the conservation strategies including ex-situ and in-situ approaches, protected area networks, wildlife protection legislation, biosphere reserves under the UNESCO MAB programme, the WLP Amendment Bill 2021, national wildlife action plans, migratory bird conservation along the Central Asian Flyway, the Wildlife Crime Control Bureau, forest community rights under the FRA 2006, and coastal regulation zones

The 2011-2020 Strategic Plan for Biodiversity and Aichi Targets, India's National Action Plan for migratory birds along the Central Asian Flyway, the South Asia Wildlife Enforcement Network (SAWEN), the Global Tiger Forum (GTF), India's National REDD+ Strategy for forest-based climate action, key protected areas including Raimona, Dehing Patkai, Srivilliputhur-Megamalai Tiger Reserve, Ramgarh Vishdhari, Guru Ghasidas Tiger Reserve, Panna Biosphere Reserve, the IUCN Red List threat categories, CITES wildlife trade regulation, the Convention on Migratory Species (CMS), key endangered species including the Jeypore Ground Gecko and Red Crowned Roofed Turtle, the global ivory trade ban, rhino horn trafficking networks, Project Tiger 1973, NTCA, the detailed 2018 tiger census findings across five landscapes, Project Dolphin 2020 for river and ocean dolphin conservation, Gangetic dolphin biology and echolocation, and Project Snow Leopard for high-altitude Himalayan conservation

Understanding climate change, the IPCC's scientific role, India's Cooling Action Plan (ICAP), the eight core NAPCC missions expanded to eleven, India's updated Nationally Determined Contributions under the UNFCCC, the twin drivers of current climate change: rising greenhouse gas emissions and shrinking carbon sinks, the cascading impacts of climate change on natural systems (sea level rise, biodiversity loss, ecological degradation) and human systems (climate migration, agricultural damage, health crises), aerosol pollution and AOD measurement, and the accelerating retreat of UNESCO World Heritage glaciers

Global climate action strategies covering mitigation (afforestation, renewable energy, carbon capture and storage) and adaptation (disaster management, climate-smart agriculture), the concept of virtual water, international climate initiatives from the 1992 Rio Summit through COP 26 Glasgow, the Kyoto Protocol's carbon market mechanisms, the Paris Agreement and India's NDCs and Panchamrit pledges, WMO key indicators of global climate change (greenhouse gas records, ocean warming and acidification, sea level rise, cryosphere loss, extreme weather, and cascading human impacts), the One Sun One World One Grid initiative, and the relationship between carbon emissions and economic inequality

The International Solar Alliance and its 'Towards 1000' strategy, India's Panchamrit pledges and linkages between climate action and the energy sector, the FAME India electric vehicle scheme, the National Hydrogen Mission and hydrogen fuel cell technology, the Ethanol Blending Programme and National Biofuel Policy, the Climate Change Performance Index, key climate conference facts, and climate action terminologies including climate equity, climate finance mechanisms (GEF, GCF, SCCF, Adaptation Fund), Common But Differentiated Responsibilities, and carbon market-based mechanisms (emissions trading, CDM, joint implementation)

The Environmental Impact Assessment process in India, its origin and objectives, the EIA Notification 2006 and its project categories, the five-step clearance process, the CAG 2017 audit findings on EIA effectiveness, and the contentious Draft EIA Notification 2020 with its proposals for post-facto approval, diluted public consultation, and expanded exemptions

What coral reefs are and why they are called the tropical rainforests of the ocean, the biology of coral polyps and their mutualistic partnership with zooxanthellae, environmental conditions coral reefs need to survive, the process and causes of coral bleaching, indicator species, and the ecological significance and conservation initiatives for coral reef ecosystems

What the ozone layer is and where it sits in the atmosphere, the difference between good stratospheric ozone and bad tropospheric ozone, how photochemical and sulphurous smog form, the mechanism by which chlorine and bromine atoms destroy ozone, the major ozone depleting substances and their journey to the stratosphere, why the Antarctic suffers the worst depletion, the Vienna Convention and Montreal Protocol, the Kigali Amendment for phasing down HFCs, and polar stratospheric clouds

India's air pollution crisis, WHO data on particulate matter levels, the Commission for Air Quality Management (CAQM), the Graded Response Action Plan (GRAP) for Delhi-NCR with its pollution classification thresholds, emergency and long-term measures to combat air pollution, the BS-VI fuel standards leapfrog, public transport strategy, the Supreme Court-directed Comprehensive Action Plan, the Supreme Court ban on heavy metals in firecrackers, evolution of emission norms from 1991 to BS-VI, specific BS-VI emission limits, India's sulphur dioxide problem from coal burning, the Supreme Court ban on pet-coke and furnace oil with the economics driving their industrial use, the National Air Quality Index with its eight parameters and six colour-coded categories, the SAFAR real-time air quality and weather forecasting system, the 2021 WHO guideline revisions for PM2.5 PM10 and NO2, India's NAAQS permissible limits, and the National Clean Air Programme targeting 40% particulate reduction by 2025-26

Understanding wetlands as distinct ecosystems, the Ramsar Convention definition, diverse wetland types including swamps, marshes, bogs, fens, coastal wetlands, and mangroves, the ecological and economic significance of wetlands, eutrophication and its causes, coastal impacts of eutrophication including harmful algal blooms, red tides, dead zones, and control strategies, global conservation efforts under the Ramsar Convention framework, India's Ramsar sites and notable wetlands, the Wetlands (Conservation and Management) Rules 2017 with key definitions and prohibited activities, and the National Wetland Conservation Programme

Understanding bioremediation as a biological approach to waste management and pollution cleanup, the four main types of bioremediation, in-situ and ex-situ treatment, common techniques such as bioventing, bioleaching, and bioaugmentation, heavy metal challenges, the Plastic Waste Management Rules 2016 with extended producer responsibility, the Solid Waste Management Rules 2016 covering source segregation, stakeholder responsibilities, and hilly area provisions, plus key environmental developments including the Miyawaki afforestation method, India's single-use plastics ban, the Global Clean Energy Action Forum, Eurasian H5N1 cross-species spread, bat conservation in the Southern Western Ghats, India's cheetah reintroduction programme, and the discovery of the world's largest plant

India State of Forest Report (ISFR) 2017 key findings on forest cover, mangroves, and bamboo; the UN-REDD and REDD+ programme for reducing deforestation emissions with India's National REDD+ Strategy; the eleven biomes of the world covering tropical evergreen, tropical deciduous, savannas, tropical deserts, Mediterranean, temperate grasslands, temperate deciduous, taiga, tundra, Laurentian, and China type climates with their vegetation, distribution, and defining features; the monsoonal climate mechanism including trade winds, differential heating, seasonal wind reversal, and tropical deciduous forest characteristics; the Mediterranean biome with pressure belt migration creating dry summers and wet winters, sclerophyllic vegetation, and orchard lands; temperate grasslands as wheat baskets of the world with prairies, steppes, pampas, and downs; temperate deciduous forests of the British-type climate at 45-60 degrees with maritime influence, hardwood species, and kauri timber; the taiga biome as Earth's greatest forest belt spanning 55-70 degrees N with coniferous softwood; the tundra biome beyond the Arctic Circle with permafrost, extreme winters, and sparse moss-lichen vegetation; the Laurentian cool temperate eastern margin climate at 45-60 degrees N with mixed coniferous-deciduous forests; the China type warm temperate eastern margin climate at 30-45 degrees with wet summers from on-shore trade winds and mulberry; and a consolidated classification of biomes into four forest types, two grassland types, deserts, tundra, and Mediterranean shrubland