As Blip says every Gov is running away from the problem as fast as possible - it will cost a fortune, it will upset all sorts of important lobbies, the voters will hate the restrictions put on them and worst of all it's so long term there is no electoral benefit to be seen for maybe 20 years.
Read this weeks "Economist" on Carbon Capture - it's not just a question of stopping or slowing future CO2 production there's a vast ocean of the stuff that from the last 50 years that needs to be removed. And it can't be done by planting trees - well it could be if you can find an area the size of Russia to plant up from scratch .