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

a) UV light from the sun, short wave length with high energy

b) 50% of this light is reflected back out into deep space main cause of this reflection is clouds

c) Absoption of the light into the earths surface where UV light is converted into Infrared

d) Infrared light with longer waves being immited back outwards

e) some of Infrared is lost in space as heat

f) green house gases such as water vapour, carbon dioxide and methane 

g) when the infrared hits these molecules it takes in the energy and re-immites the infrared in all directions including downwards to the earths surface warming the surface of the earth. this is called the green house effect.

ENHANCED GREENHOUSE EFFECT 

is when more of the greenhouse gases are produced absorbing more of the infrared reflecting out of earth and immiting it back onto the earths surface increasing the temperature further leading to climate change

CFC - Cluorofluorocarbon

effects the ozone layer which absorbs UV light making it less efficient in absorbing UV light.