noun

rain containing a high level of acid that can damage the environment. It is caused by pollution in the air.

noun

carbon emissions

noun

a gas without colour or smell, produced when you breathe out or when substances containing carbon are burnt. The fact that the earth is getting hotter because of carbon dioxide in the atmosphere is called the greenhouse effect.

noun

carbon dioxide and carbon monoxide in the atmosphere, produced by vehicles and industrial processes

noun

chlorofluorocarbon: a gas used in fridges and in some aerosol containers. CFCs are not often used any more because they damage the ozone layer of the Earth’s atmosphere.

noun

a cfc

noun

a substance that makes something dirty, polluted, or poisonous

noun

substances that make something dirty, polluted, or poisonous

noun

liquid waste such as sewage (=human waste) or waste from a factory

noun

a substance, especially a gas, that goes into the air

noun

gases or steam produced by an engine as it works

noun

a chemical that is thought to damage the ozone layer of the Earth’s atmosphere

noun

the activity of leaving waste material in a place where it is not allowed

noun

a gas that stops heat from escaping from the atmosphere and causes the greenhouse effect. Carbon dioxide is a greenhouse gas.

noun

a very poisonous brown gas often found in smog and exhaust from vehicles

noun

dangerous or annoying levels of noise

noun

a layer of oil floating on the sea or on a lake

noun

extremely small particles of a substance or substances, especially those that cause air pollution

noun

a substance that is harmful to the environment

noun

chemicals and other substances that have a harmful effect on air, water, or land

noun

a flow of water or chemicals from one place to another, especially when this damages the environment

noun

polluted air that is a mixture of smoke and fog

noun

an industry involved in making things in factories using big machines and processes that produce a lot of pollution

noun

a poisonous gas with a strong smell, used in industry and often a cause of air pollution

noun

industrial or chemical waste products that are harmful to the environment