B1 U6-7 Vocab Review

a long period when there is little or no rain

• drought

• ozone layer

the air, water, and land in or on which people, animals, and plants live

• environment

• global warming

become covered with water, especially in a way that causes problems

• flood

• oil spill

an increase in world temperatures caused by gases

• global warming

• greenhouse effect

when heat can't escape from the atmosphere and the temperature goes up

• greenhouse effect

• global warming

an accident with nuclear power causing radioactivity

• nuclear disaster

• flood

an accident when oil comes out of its container, for example at sea

• nuclear disaster

• oil spill

a layer of air that prevents harmful ultraviolet light from the sun from reaching the earth

• ozone layer

• waste

damage caused to water, air, etc.

• pollution

• waste

to sort and collect rubbish

• save

• recycle