What is the primary cause of global warming?


Statistics:

Human emissions of greenhouse gases
Votes: 53
47.3%  
Natural earth or sun cycle
Votes: 13
11.6%  
Cause is unknown. Too many variables
Votes: 17
15.2%  
Global warming is not real. It is a media creation like the "Global Cooling" scare of the 1970's
Votes: 23
20.5%  
Other
Votes: 6
5.4%  

Number of Voters   112
Start Voting   2012-03-13 23:25:58
End Voting   2034-04-13 23:25:58