SteP.

(effect of finishi.)
the background,use a gradually change make it like a space.

use pen tool delineate the crack,gradually change again.

depict the crack,make it stereoscopic.

make a setting sun,firstly do the gradually change write to red to orange.secondly a circle useed orange color from a point to edge.

all use pen tool do a person,

put it on the pic.

do a frame make the hole pic like a photo that mounted.

make the points which write CO2 around the person.
write :global warming like postmark.
plus a label and shadow .ok finished like the first pic.

DesiGn StateMent for Global WarMinG

Global warming is the increase in the average temperature of the Earth's near-surface air and oceans since the mid-twentieth century, and its projected continuation.
Causes
The break of natural environment.evevy year humen cut a great deal of trees.natural need a period to cure themself, but we give a very short time to keep every thing become new,result the tree become less and out environment become bad.Without the tree that no one can absorb CO2 than make O2,regulate the temperature and stop the land sand turn.In other saide,in my country China,because of the increase in the society develop,the environmental protection become to the secound thing which our pay attantion.
CO2 from factory and the car,so many CO2 exhaust to environment,but the protect ability of environment are not enough.CO2 is not only bad for the environment but also very bad for humen.If humen don't stop this than some years later all us need a anti-virus mask like a mobile phone..
Result
1.world temperature change.
2.South Pole the glacier melt
3.The foreland is drown
4.River in the inland region is withered
http://en.wikipedia.org/wiki/Global_warming
http://baike.baidu.com/view/146638.htm

So my sketch is this:

I want do some poster like Black humor,in a comfotable and warm afternoon,a person is fishing near the “river”, all the earth was dry and cracked and the fish was dead.he ware a anti-virus mask because all he CO2 around he and he was reading the newspaper,on the newspaper write that the temperature of today is 44 celsius degree.
Than make this picture like a photo,give it a label:go fishing near the river..