contaminate
/kənˈtæməˌneɪt/to make water, food or land dirty or unsafe by adding a harmful substance
Example: Chemicals from the factory could contaminate the village's drinking water.

B218 words · Upper-intermediate
Pollution vocabulary for news and discussion about the environment, covering emissions, toxic waste, acid rain and groundwater, and ideas like biodegradable and e-waste.

to make water, food or land dirty or unsafe by adding a harmful substance
Example: Chemicals from the factory could contaminate the village's drinking water.

gases or other substances sent out into the air, for example by cars and factories
Example: The government wants to cut emissions from cars by half.

rubbish from factories that is poisonous and dangerous to people and nature
Example: They found barrels of toxic waste hidden in the woods.

water falling from the clouds that harms plants and buildings because the air has dirty gases in it
Example: Acid rain has damaged many of the old stone statues here.

able to break down naturally in the earth without harming nature
Example: These plates are biodegradable, so you can put them in the compost.

very dangerous, especially to people's health or safety
Example: Workers must wear masks when handling hazardous materials.

a substance that makes air, water or soil dirty and harmful
Example: Sulphur dioxide is a major pollutant in many big cities.

the gas that people and animals make when they breathe out, and that is also made when fuel is burned; plants take it in
Example: Trees take in carbon dioxide and give out oxygen.

the way rubbish is taken away and got rid of safely
Example: Our town has a new system for waste disposal.

a large machine or building where rubbish is burned
Example: The new incinerator burns rubbish and makes electricity for the town.

rainwater that flows over the ground and carries dirt or chemicals into rivers
Example: Run-off from the farm has turned the stream green.

Too much bright glow from street lamps and buildings that hides the stars at night.
Example: Light pollution makes it almost impossible to see stars from the city.

water that is stored under the earth and comes up in wells and springs
Example: Fertiliser can slowly seep into the groundwater below the fields.

getting rid of rubbish in a place where it is not allowed
Example: Dumping old fridges in the forest is against the law.

the thin part of the sky that protects the Earth from the Sun's harmful rays
Example: Some old chemicals were harming the ozone layer above the poles.

a big, organised job to remove dirt or damage after an accident
Example: A huge clean-up operation began on the beach after the leak.

Old phones, computers and other electrical goods that people throw away.
Example: Mountains of e-waste are shipped abroad every year.

A number that shows how much harmful dirt is in the air we breathe on a particular day.
Example: Schools stayed closed because the air quality index was far too high.
