Global Warming

Temperatures don't drop so much on cloudy nights

• due to the blanket efefct of the clouds trapping heat in.

• Due to radiation from the Sun

• by chance

Greenhouse gases in the atmosphere

• prevent the escape of infrared radiation

• are always harmful

• don't do anything

Without greenhouse gases

• The Earth's temperature would increase a lot

• The Earth's temperature would be much lower than it is now

• we'd be the same as now

The quantity of greenhouse gases has risen due to

• drought

• climate change

• Human activity causing pollution

Global warming is caused by

• a decrease in amount of greenhouse gases

• An increase in greenhouse gases

• nature

The most important single factor in global warming is

• oxygen

• nitrous oxide

• carbon dioxide

Burning fossil fuels doesn't produce

• carbon dioxide

• oxygen

• global warming

CFCs don't come from

• aerosols

• packaging

• refrigerators

• squirrels

Nitrous acid doesn't come from

• agricultural fertiliser

• power stations

• plants

Effects of global warming don't include

• sea levels are rising

• Ice caps abd glaciers are melting

• Sea temperatures are decreasing