If any govt at all in any of the developed countries gave a monkey's about the environment they'd be investing in renewable energy - not just for us in the West but for ALL countries.
Countries like China, India, the developing African nations have a huge carbon footprint - it dwarfs ours in the UK. These people are very largely p*ss-poor. Their children are malnourished to the extent that many of them die of starvation, or diseases related to it. They are all frantically developing their economies - and why shouldn't they? Why should they be expected to watch their babies die while we in the West have (largely) a lifestyle that seems beyond their wildest dreams and are still demanding more and more, expecting them to work as slaves within their own economies to fuel our demand for cheap clothing and food? Of course they want to develop their economies which will add even more to global warming.
As a parent, I can tell you now that if I had a choice of a good life for my kids, or propping up rich western lifestyles and the world burning in 50 years time if nothing is done, I'd take the risk and burn the world! I'd be thinking "Bugger them! They're not using me and my children as stepping stones to an even bigger car/ house/ holiday".
Unless we develop the technology - and SHARE it, not try to cream ridiculous profits off it - then we're all doomed anyway.