Greenhouse gases
Green house effect
The Sun is the only source of outside heat for the Earth. Sunlight heats the Earth's surface during the day. As the Earth's surface warms up it also releases heat, but we cannot see this as light like sunlight from the Sun.
Green house effect
The greenhouse effect is the process where the natural layer of gases in our atmosphere trap a small percentage of the sun's heat reflected from the earth's surface.
Green house effect
Carbon dioxide is a green house gas. It occurs in very small quantities naturally in the atmosphere.
Green house effect
The amount of carbon dioxide in the atmosphere is linked to the average global temperature.
Green house effect
The amount of carbon dioxide in the atmosphere has increased dramatically over the last 100 years
Green house effect
Carbon dioxide is released when fossil fuels are burned.
Green house effect
Water vapour, methane and nitrogen dioxide are also important green house gases.
Greenhouse effect
Water vapour is created when water evaporates, plants transpire (release water from their leaves) or when animals breathe.
Warm air can contain more water vapour than cool air. The extra water vapour provides more insulation, causing further warming.
This is called feed back.
Greenhouse effect
Methane is released when rubbish rots, by farm animals and from paddy fields. It is a very potent Greenhouse gas.
Greenhouse effect
Nitrogen dioxide is a green house gas that is released when fossil fuels are burnt at high temperatures and is often associated with the pollution from transport.
It as a potent and long lasting green house gas.
Activities
Green house effect
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