Is the Kyoto Protocol a controversial agreement? Which parties might be against it? What is your viewpoint on global Climate change?

The Kyoto Protocol was conferred around Dec '97, in Japan and put into effect on 16 Feb ., 2005.

"The Kyoto Protocol serves as a legally binding contract which developed nations will lessen their combined pollutants of greenhouse gases by 5.2% in comparison to the 90s (however understand that, in comparison to the emission quantities expected by the year 2010 minus the protocol that represents targeted 29 Percent decrease). The objective is to lessen general pollutants of half a dozen greenhouse gases - Nitrous Oxide, CO₂, methane, PFCs, HFCs, and Sulphur Hexaflouride. 

Question: Is the Kyoto Protocol a controversial agreement? Which parties might be against it? What is your viewpoint on global Climate change?