4.12- Greenhouse Effect

a) represents UV light from the sun (short wavelength, high energy)
b) shows that 50% is reflected back mainly by the clouds
c) shows absorption on the surface where the UV light is converted and emmited as Infra-red
d) shows the Infra-red (longer wavelength) being emitted back out
e) shows heat which is lost to space
f) represents some of the greenhouse gases like water vapour, CO2, CH4
g) Infra-red light absorbs the greenhouse gas and then re-emits and re-distributes it with some of the gases going back to the surface

The hypothesis of the enhanced greenhouse effect is that if we emit more CO2 and CH4, they will absorb more of the escaping Infra-red radiation and emit it back to earth, raising the temperature higher and causing climate change
CFC are well known for their effect on the ozone layer O3
CL- catalyses the breakdown of O3 to O2. O3 is better than absorbing light than O2 so we are basically removing the protection of the ozone layer.