Short answer: Climate change is one of the most predictable IELTS themes, so precise words such as anthropogenic, mitigation, decarbonise and irreversible are among the fastest ways to lift your Lexical Resource band. Each replaces a vague phrase with an accurate, less common item that signals higher-band control.
Climate questions appear across Writing Task 2 and Speaking Part 3 — from renewable energy and emissions targets to extreme weather and rising seas.
Because the subject is so predictable, its vocabulary can be prepared in advance, and a candidate who writes mitigation and sequestration instead of “stopping it” and “storing carbon” reads at once as a higher-band writer.
This guide gives you 30 genuine Band 7+ climate words, each with the collocation that makes it usable and a correct example sentence.
Why topic vocabulary lifts your Lexical Resource band
In both Writing and Speaking, Lexical Resource is one of four criteria, each carrying equal weight — so it accounts for a full quarter of your mark on those papers.
The public band descriptors state that Band 7 needs “less common lexical items… with some awareness of style and collocation”, which is exactly the kind of precise, topic-specific language a predictable theme like climate change lets you prepare in advance rather than improvise under pressure.
Accuracy beats decoration, though: a less common word dropped into the wrong collocation — writing “do a mitigation” or “a big emission” — reads as reach without control and can lower your band rather than raise it.
That is why every entry below is paired with its natural partners. For a structured month of building this vocabulary across topics, follow our 30-day vocabulary plan.
30 Band 7+ Climate Change words
Read down the table for each word’s meaning, then across to the collocation and example, which shows the word doing the job it would do in a real answer.
| Word | Meaning | Collocation / common usage | Example sentence |
|---|---|---|---|
| anthropogenic | originating in human activity | anthropogenic warming, anthropogenic emissions | Almost all climate scientists agree that anthropogenic emissions are the main driver of recent warming. |
| mitigation | action taken to reduce the severity of climate change | climate mitigation, mitigation strategies | Mitigation strategies aim to cut emissions before warming becomes irreversible. |
| adaptation | adjusting systems and behaviour to cope with climate impacts | climate adaptation, adaptation measures | Coastal cities are investing in adaptation measures such as flood barriers and sea walls. |
| carbon-neutral | producing no net release of carbon dioxide | carbon-neutral, become carbon-neutral | Dozens of countries have pledged to become carbon-neutral by the middle of the century. |
| decarbonise | to remove or reduce carbon emissions from an activity | decarbonise the economy, decarbonise industry | Governments are under pressure to decarbonise the energy sector within two decades. |
| greenhouse effect | the trapping of heat in the atmosphere by certain gases | the greenhouse effect, intensify the greenhouse effect | Burning fossil fuels intensifies the greenhouse effect and raises global temperatures. |
| sequestration | the capture and long-term storage of carbon dioxide | carbon sequestration | Restoring wetlands is a natural form of carbon sequestration. |
| carbon sink | a natural store that absorbs more carbon than it releases | a carbon sink, act as a carbon sink | Oceans and forests act as vital carbon sinks that slow the pace of warming. |
| resilience | the capacity to withstand or recover from shocks | climate resilience, build resilience | Farmers are planting drought-tolerant crops to build resilience against a changing climate. |
| feedback loop | a process in which an effect amplifies its own cause | a feedback loop, a positive feedback loop | Melting ice creates a feedback loop that accelerates further warming. |
| tipping point | a threshold beyond which change becomes self-sustaining | reach a tipping point, a dangerous tipping point | Scientists warn that some ice sheets may be approaching a dangerous tipping point. |
| unprecedented | never previously known or experienced | unprecedented levels, an unprecedented rate | Carbon dioxide has reached unprecedented levels in the atmosphere. |
| exacerbate | to make a problem more severe | exacerbate the problem, exacerbate droughts | Deforestation exacerbates the effects of a warming climate. |
| vulnerable | exposed to harm; easily affected | vulnerable communities, vulnerable to flooding | Low-lying island nations are especially vulnerable to rising sea levels. |
| drought | a prolonged period of abnormally low rainfall | prolonged drought, severe drought | Prolonged drought has devastated harvests across much of the region. |
| sea level rise | the increase in ocean height caused by warming | sea level rise, accelerating sea level rise | Accelerating sea level rise threatens the millions of people who live near the coast. |
| desertification | the process by which fertile land becomes desert | combat desertification | Overgrazing and drought are driving desertification across the region. |
| emissions | gases released into the atmosphere, especially harmful ones | cut emissions, greenhouse gas emissions | Nations have committed to cut emissions sharply over the coming decade. |
| renewable | (of energy) from sources that are not used up | renewable energy, renewable sources | A rapid shift to renewable energy would slow the pace of warming. |
| fossil fuels | natural fuels such as coal, oil and gas | burn fossil fuels, phase out fossil fuels | Many countries are under pressure to phase out fossil fuels altogether. |
| deplete | to reduce a resource to a critically low level | deplete resources, deplete the ozone layer | Certain industrial chemicals deplete the protective ozone layer. |
| offset | to counteract emissions, for example by funding tree planting | carbon offset, offset emissions | Some airlines allow passengers to offset the emissions from their flights. |
| extreme weather | severe or unusual weather events | extreme weather events, more frequent extreme weather | Climate change is making extreme weather events more frequent and intense. |
| glacial retreat | the melting back of glaciers over time | glacial retreat, rapid glacial retreat | Glacial retreat in the Himalayas threatens the water supply of millions. |
| permafrost | ground that remains frozen for years at a time | thawing permafrost, melting permafrost | Thawing permafrost releases methane, a particularly potent greenhouse gas. |
| inundate | to flood or submerge with water | inundate low-lying areas | Rising seas could eventually inundate entire island nations. |
| curb | to restrain or limit something | curb emissions, curb pollution | International agreements are designed to curb greenhouse gas emissions. |
| irreversible | impossible to undo or reverse | irreversible damage, irreversible change | Beyond a certain point, warming may cause irreversible damage to ecosystems. |
| deforestation | the large-scale clearing of forests | combat deforestation, widespread deforestation | Deforestation both releases stored carbon and destroys a crucial carbon sink. |
| carbon footprint | the total greenhouse gases produced by a person or activity | reduce your carbon footprint, a large carbon footprint | Switching to public transport is one way to reduce your carbon footprint. |
How to turn these words into marks
Learn each word inside its collocation, not on its own: memorising mitigation alone helps little, but “mitigation strategies” or “mitigate the effects of climate change” gives you a phrase you can drop into an essay without a grammar risk.
Use one or two precise items per paragraph where they are natural — accuracy earns more than a parade of impressive nouns you cannot control.
To make the words active, meet them again in the climate change reading practice and drill a word a day with the Word Coach.