There are all sorts of other things that people talk about as greenhouse gases: methane, sulfur hexafluoride, chlorofluorocarbons, etc. At the present time carbon dioxide is increasing rapidly and already makes up 10% by volume of all greenhouse gases in the atmosphere. However, some of those other gases are much more potent than CO2, so they could become dangerous if released in large quantities.

Many people fear arctic methane release due to rising temperatures more than CO2--of course, it's the increase of CO2 in the atmosphere that would drive that.

No, they also pump a lot of hot air out, claiming that there is no such thing as climate change and ,if there is, they are not responsible for it and, if they are, it is too late to do anything about it, so we may as well let them continue polluting.

Perhaps only on a good day.

No, especially not in the past. But most other pollutants have been dwelt with.

http://en.wikipedia.org/wiki/Montreal_Pr...

http://www.cbc.ca/archives/categories/en...

No, but that is the topic most easily manipulated by goverments for political purposes.

No

no