The first world leader to bring discussion about global climate change to the international table, ironically, was the conservative Margaret Thatcher.
In the US today conservatives today lead a chorus of skepticism against scientists who publish findings of measurable climate change. Among scientists, there is contentious disagreement about the interpretation the the data, and fixing causes, effects, and consequences of the data.
In the UK, the government's chief science adviser calls global warming a greater threat than international terrorism; while in the US, James Inhoff (R-OK), head of the senate committee looking into climate change calls it "possibly the greatest hoax ever perpetrated on the American people".
The Bush administration has interferred in presenting the case made by scientists to the public insisting on changing language and altering conclusions. The Oil industry lobby peddles its influence in the name of the economy and funds studies used challenge claims by climate change researchers.
In short, it's become nearly impossible to know what to think about global climate change except that America's dependence on fossile fuels is at the heart of the controversy.
Here you will find an excellent BBC Radio 4 two-part program about the politiciation of public discourse about global warming.