gas, coal, and oil, that were formed underground from plant and animal remains millions of years ago

the problem of the slow steady rise in temperature of the earth’s atmosphere, caused by an increase of gases such as carbon dioxide in the air surrounding the earth, which trap the heat of the sun

a synonym of 'produce'

to break down something into smaller and simpler parts

leave trash in a place

Carbon dioxide and Sulphur dioxide are called ...

coughing, asthma, and lung cancer are ...

the process by which soil is gradually removed from the surface of the earth by the action of the rain, sea, or wind

materials produced as a result of industrial activity, including solid rocks, chemicals, plastics, and other harmful substances

the gas or steam that is produced when the engine of a vehicle is running

a chemical used for killing pests, especially insects

an illness usually caused by eating food that contains harmful bacteria

the act of cutting down or burning the trees in an area