UNIT 5: GLOBAL WARMING

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

• greenhouse

• human activities

• fossil fuel

• global warming

Wind and sunlight are examples of _________ sources of energy.

• limited

• renewable

• non-renewable

• polluted

The world produces more than two billion tonnes of solid _________ every year.

• coal

• waste

• sea levels

• gases

Goverments need to limit the amount of greenhouse gases that is ______ into the air.

• released

• polluted

• formed

• trapped

The gases are mainly produced through ___________.

• nagative impact

• global warming

• heat- trapping pollutants

• human activities

A black rock that is found under the ground and is burnt to produce heat.

_________is an increase in the amount of carbon dioxide and other gases in the atmosphere, that is believed to be the cause of a gradual warming of the surface of the earth

Higher ___________ can also lead to floods.

• heat-trapping pollutants

• global warming

• sea levels

• human activities

synonym of "renewable"

• endless

• infinite

• inexhaustible

• all are correct

Which are the causes of global warming?

• human activities, large amount of carbon dioxide

• rising sea levels, ice melting, floods.