What is the primary cause of global warming?
|Human emissions of greenhouse gases|
|Natural earth or sun cycle|
|Cause is unknown. Too many variables|
|Global warming is not real. It is a media creation like the "Global Cooling" scare of the 1970's|
|Number of Voters||101|
|Start Voting||2012-03-13 23:25:58|
|End Voting||2034-04-13 23:25:58|