4.13 Greenhouse gases

4.13 Greenhouse gases

Understand how human activities contribute to green house gases

Fossil Fuels:

1) Industrial (factories)

2) Cars

3) Domestic

The burning of fossil fuels causes the release of Carbon dioxide, nitrous dioxide and sulphur dioxide. These are known as greenhouse gases. These gases in upper atmosphere absorb infrared light and redistribute the gases to the surface of the planet.

Farming- Animals (cows) when digesting crops emit Methane gas into the atmosphere. It is a significant contributor to the greenhouse gases- almost 9%

Evaporation of water- forms water vapour- clouds are also adds to greenhouse gases

Refrigeration/solvents/propellants- known as chlorofluorocarbons (CFC's).  A combination of Chlorine, Carbon, and Fluorine (Cl₃F)