V. Choose the best option to complete each sentence

A strong greenhouse effect will warm the oceans, melt glaciers and increase _______.

• temperature

• sea water

• sea level

• pollution

The increase in the earth’s temperature can cause ______ illness which can be dangerous to people.

• heat-related

• green house

• kind-hearted

• natural gas

The ozone layer helps _______ us from the sun's rays.

• prevent

• protect

• preserve

• maintain

Global warming also has _______ impact on water supplies.

• stable

• severe

• infectious

• easy

A(n) _______disease is an illness that can be passed from one person to another

• dangerous

• chemical

• man-made

• infectious

Warmer conditions will probably lead to more evaporation and rain overall, but individual regions will ______, some becoming wetter and others dryer

• limit

• change

• vary

• more

All of the disasters resulted from ______ will continue have a devastating effect on socio-economic development

• flood

• climate change

• ecological balance

• carbon footprint

Global warming is an increase in the average _______ of the earth’s atmosphere.

• climate

• balance

• temperature

• vehicle

Air _______ is threatening the health of older people and children.

• pollution

• acid rain

• deforestation

• global warming

. ________ is a stable ecosystem in which a large number of species live together.

• greenhouse gas

• climate change

• global warming

• ecological balance