@Greg My guess would be that people in richer countries tend to realize that the less economic growth and job losses would be for them - they are the ones who will have to pay most to abate emissions. Whereas people in developing countries may see the lost jobs as happening elsewhere. Also, temperate countries like Russia (or even the US) will arguably be hit less severely by climate change than will more tropical countries, so it makes sense for their citizens to be less willing to give up growth. And there is a strong correlation between latitude and income. Obviously general political/cultural attitudes (like American exceptionalism) also play a large part.