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🌍 Environment Vocabulary for IELTS & TOEFL

Critical vocabulary for environmental issues, climate change, and sustainability—essential for IELTS Task 2 essays on pollution, conservation, and ecological challenges.

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Environment word list

carbon footprint phrase — the total amount of greenhouse gases produced by human activities
“Reducing personal carbon footprint requires changes in transportation and consumption habits.” ↗ emissions impact
biodiversity noun — the variety of different plant and animal species in an environment
“Tropical rainforests contain 50% of Earth's biodiversity.” ↗ species diversity
sustainable adj — able to be maintained or continued without depleting natural resources
“Sustainable agriculture protects soil health for future generations.” ↗ eco-friendly
renewable adj — capable of being replenished or regenerated naturally
“Solar and wind power are renewable energy sources unlike fossil fuels.” ↗ replenishable
deforestation noun — the clearing, removal, or destruction of forests
“Deforestation in Southeast Asia threatens countless endangered species.” ↗ forest clearance
pollutant noun — a substance that contaminates air, water, or soil
“Industrial pollutants from factories damage aquatic ecosystems.” ↗ contaminant
mitigation noun — actions taken to reduce the severity or impact of something harmful
“Climate change mitigation requires transitioning away from coal energy.” ↗ reduction
ecosystem noun — a community of organisms and their physical environment functioning together
“Wetland ecosystems provide crucial habitats for migratory birds.” ↗ environment
degradation noun — the process of becoming worse in quality or value; deterioration
“Land degradation from overgrazing reduces agricultural productivity.” ↗ deterioration
conservation noun — the protection and preservation of natural resources and wildlife
“Conservation efforts have saved species like the giant panda from extinction.” ↗ preservation
emission noun — the discharge or release of gases, particles, or radiation into the environment
“Vehicle emissions are a major source of urban air pollution.” ↗ discharge
scarcity noun — the state of being insufficient in quantity; lack of something needed
“Water scarcity affects over 2 billion people worldwide.” ↗ shortage
recycle verb — to collect and reprocess waste materials into new products
“Recycling programs reduce landfill waste and conserve natural resources.” ↗ reprocess
contamination noun — the presence of unwanted or harmful substances in an environment
“Soil contamination from chemical spills requires expensive remediation.” ↗ pollution
habitat noun — the natural environment where an organism or species lives
“Loss of habitat is the primary threat to endangered species.” ↗ environment
resilience noun — the capacity of an ecosystem to recover from disturbances
“Coral reef resilience decreases with rising ocean temperatures.” ↗ recovery capacity
depletion noun — the reduction in quantity or exhaustion of a resource
“Overfishing causes depletion of fish stocks in many oceans.” ↗ exhaustion
pesticide noun — a chemical substance used to kill insects, weeds, or other organisms
“Excessive pesticide use harms non-target species and pollutes groundwater.” ↗ insecticide
environmental impact phrase — the effect of human activities on the natural environment
“Large infrastructure projects must undergo environmental impact assessments.” ↗ ecological effect
carbon neutral phrase — achieving a state where greenhouse gas emissions are balanced by removals
“Several countries aim to become carbon neutral by 2050.” ↗ net-zero emissions
anthropogenic adjective — caused or produced by human activity, especially regarding environmental change
“Anthropogenic climate change has accelerated atmospheric warming significantly.” ↗ human-caused
sustainability noun — the capacity to maintain resource use without depleting them for future generations
“Sustainable agriculture balances productivity with environmental conservation.” ↗ long-term viability
desertification noun — the process by which fertile land gradually becomes desert due to environmental degradation
“Overgrazing and drought have accelerated desertification across the Sahel region.” ↗ land degradation
eutrophication noun — excessive nutrient enrichment of water bodies causing algal blooms and oxygen depletion
“Agricultural runoff contributes to eutrophication of coastal waters.” ↗ nutrient pollution
extractive adjective — relating to the removal of natural resources from the earth for economic benefit
“Extractive industries such as mining have substantial environmental impacts.” ↗ resource-exploitative
erosion noun — the gradual wearing away of soil, rock, or land by water, wind, or other natural forces
“Coastal erosion threatens communities and infrastructure in vulnerable regions.” ↗ land degradation
restoration noun — the process of returning an ecosystem or landscape to a more natural or productive state
“Wetland restoration projects aim to rehabilitate damaged ecosystems.” ↗ rehabilitation, recovery
climate resilience phrase — the capacity of systems and communities to adapt to climate change impacts
“Building climate resilience requires investing in infrastructure and early warning systems.” ↗ adaptive capacity
biodegradable adjective — capable of being broken down naturally by biological processes
“Biodegradable packaging materials reduce plastic waste in landfills.” ↗ decomposable
watershed noun — an area of land where all water drains into a particular body of water
“Protecting the watershed is crucial for ensuring clean drinking water supplies.” ↗ drainage basin
permafrost noun — permanently frozen ground in arctic and subarctic regions that is thawing due to climate change
“Melting permafrost releases methane, a potent greenhouse gas.” ↗ frozen ground
pristine adjective — in its original, unspoiled, or pure state; uncorrupted by human activity
“The pristine wilderness areas of the national park attract conservation-minded visitors.” ↗ untouched, unspoiled

How to actually use environment vocabulary in the exam

A word list is where vocabulary study starts and where most of it unfortunately stops. Lexical Resource is a quarter of your Writing and Speaking band, and it is not scored on how many unusual words you produce — it is scored on precision, collocation and word formation. A common word used exactly beats a rare one used approximately, every time.

Where environment actually comes up. Topic vocabulary earns most in Speaking Part 3, where questions turn abstract and general, and in Writing Task 2, where a precise word can carry an argument a vague one cannot. It matters least in Listening and Reading, where you need to recognise paraphrase rather than produce it — which is exactly why passive list-reading feels like it is working while your Speaking and Writing bands stay where they were.

A realistic way to use this page. Take five words, not fifty. Write one sentence with each, on a question you might genuinely be asked. Say them out loud, because a word you have never pronounced will not arrive under pressure. Come back in a few days and produce them from the definitions alone. Five words you can use are worth more in the exam than fifty you can recognise, and that ratio is the whole reason most vocabulary study does not move a band.

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