Tuesday, 10 May 2016

4.12 understand that water vapour, carbon dioxide, nitrous oxide, methane and CFCs are greenhouse gases

NOTE: You may be asked where the greenhouses originate from. Well, its not in the spec but it was in the 2015 paper so just to be safe I have included the info (its in red).

Greenhouse gases are bad as they trap heat from the sun in the earths atmosphere. Examples of greenhouse gases include...

- Water vapour
- Carbon dioxide (deforestation, industrial processes, car exhausts)
- Nitrous oxide (fertilisers, vehicle engines, natural release from bacteria)
- Methane (rotting plants, rice growing, cattle rearing)
- CFCs (NOTE: CFCS are man-made chemicals, they are basically not produced anymore but some still are and are leaking from old products that contain them)

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