Somehow, I think the left-right politics sound a bit outdated when you consider climate issues. A few excerpts from the Stern Report:
Climate change threatens the basic elements of life for people around the world – access to water, food, health, and use of land:
a. Melting glaciers will increase flood risk during the wet season and strongly reduce dry season water supplies to one-sixth of the world’s population;
b. Declining crop yields are likely to leave hundreds of millions without the ability to produce or purchase sufficient food;
c. Ocean acidification will have major effects on marine ecosystems with adverse consequences on fish stock;
d. Rising sea levels will result in tens to hundreds of millions more people flooded each year. Large cities such as Tokyo, Shanghai, Hong Kong, Calcutta, New York, Miami, London are at major risks.
e. By the middle of the century, 200 million more people will become permanently displaced due to rising sea levels;
The GHGs to cause all of the above has already been accumulated in the atmosphere and might cost about 5% of the Global World Product to mitigate.
Sorry for the bad news.