4.13 Greenhouse gases

1. Human activities such as the burning of fossil fuels results in the formation of more carbon dioxide, nitrodioxide, and sulphur dioxide.
2. These are all the greenhouse gases.
3. They absorb infrared light and redistirubute it back to earth.

Human activities that contribute to greenhouse gases

1. The burning of coal, engine emissions, and domestic combustion of coal.
2. Farming is also involved as a contributing factor to greenhouse effect. Cows for instance emmit methane gas.
3. Evaporation of water to form water vapour. These form clouds.
4. Refrigeration, solvents and propelents release the CFCs