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Environment Vocabulary

Climate change, pollution, conservation, and sustainability — essential vocabulary for IELTS Writing Task 2 and Speaking Part 3.

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15 words·Band 5: 3Band 6: 4Band 7: 5Band 8: 3

pollution

nounBand 5
writingspeakingreading

The introduction of harmful substances into the natural environment

“Air pollution in major cities has reached dangerous levels in recent years.”
air pollutionwater pollutionreduce pollutioncause pollution

renewable energy

noun phraseBand 5
writingspeaking

Energy from sources that are naturally replenished, such as wind or solar power

“Governments must invest heavily in renewable energy to combat climate change.”
renewable energy sourcesinvest in renewable energyswitch to renewable energy

deforestation

nounBand 5
writingreading

The large-scale clearing of forests, typically for agriculture or urban development

“Deforestation in the Amazon threatens thousands of plant and animal species.”
rampant deforestationhalt deforestationdeforestation ratecombat deforestation

carbon emissions

noun phraseBand 6
writingspeaking

The release of carbon dioxide into the atmosphere, primarily from burning fossil fuels

“Reducing carbon emissions is central to every national climate strategy.”
cut carbon emissionscarbon emissions targetreduce carbon emissionscarbon emissions per capita

biodiversity

nounBand 6
writingreading

The variety of plant and animal life in a particular habitat or on Earth as a whole

“Urban expansion continues to erode biodiversity in coastal wetlands.”
protect biodiversityloss of biodiversityrich in biodiversitybiodiversity hotspot

sustainability

nounBand 6
writingspeakingreading

The ability to maintain processes without depleting natural resources or harming the environment

“Corporations are under increasing pressure to demonstrate environmental sustainability.”
long-term sustainabilityenvironmental sustainabilitypromote sustainabilitysustainability goals

greenhouse gas

noun phraseBand 6
writingreading

A gas that traps heat in the atmosphere, contributing to the greenhouse effect and global warming

“Methane is a potent greenhouse gas released by livestock farming.”
greenhouse gas emissionsreduce greenhouse gasesgreenhouse gas concentration

ecological footprint

noun phraseBand 7
writingspeaking

A measure of the environmental impact of an individual or community based on resource consumption

“Adopting a plant-based diet is one of the most effective ways to reduce your ecological footprint.”
reduce ecological footprintmeasure ecological footprintlarge ecological footprint

mitigation

nounBand 7
writingreading

Action taken to reduce the severity or impact of a problem, especially climate change

“Climate mitigation strategies must be implemented alongside adaptation measures.”
climate mitigationmitigation strategymitigation measuresrisk mitigation

habitat destruction

noun phraseBand 7
writingreading

The process by which a natural habitat is made unable to support the species that live there

“Habitat destruction remains the primary driver of species extinction worldwide.”
widespread habitat destructioncaused by habitat destructionprevent habitat destruction

carbon footprint

noun phraseBand 7
writingspeaking

The total amount of greenhouse gases produced by an individual, organisation, or activity

“Airlines are under pressure to offset their considerable carbon footprint.”
reduce carbon footprintcalculate carbon footprintlarge carbon footprintcarbon footprint offset

sequestration

nounBand 7
writingreading

The process of capturing and storing atmospheric carbon dioxide in natural sinks such as forests or oceans

“Reforestation programmes support carbon sequestration on a significant scale.”
carbon sequestrationsequestration of CO2natural sequestration

anthropogenic

adjectiveBand 8
writingreading

Originating in human activity, particularly with reference to environmental change

“The scientific consensus is that current global warming is primarily anthropogenic.”
anthropogenic climate changeanthropogenic emissionsanthropogenic factors

ecosystem services

noun phraseBand 8
writingreading

The benefits that humans derive from functioning ecosystems, such as clean water, pollination, and climate regulation

“The economic value of ecosystem services provided by mangroves is often overlooked.”
value of ecosystem servicesloss of ecosystem servicesecosystem services framework

decarbonisation

nounBand 8
writingreading

The process of reducing the carbon dioxide output of a country, industry, or activity

“Rapid decarbonisation of the energy sector is essential to meeting net-zero targets.”
decarbonisation pathwayaccelerate decarbonisationenergy sector decarbonisation

Use these words in an essay

Practise this vocabulary on real Writing Task 2 questions about environment and climate change, with model answers and band-level tips.

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