Politicians will change. They simply have to.
Just finished a very depressing book "Oil's Deep State: How the petroleum industry undermines democracy and stops action on global warming - in Alberta, and in Ottawa" which plainly shows why the NDP government in Alberta and the Liberal government in Ottawa are addressing climate change more with rhetoric than real action. As long as the politicians can keep taking money from the fossil fuel folks, and those folks ingratiate themselves across society with their money, they may double-down on the denial rather than really do anything substantive.
In Ontario, the most populace province in Canada, we may soon have a Progressive Conservative government that will repeal cap & trade and is committed to no carbon taxes. It may very well be a major landslide, with "Ford Nation" taking over - the brother of the lunatic crack-smoking ex-mayor of Toronto (Rob Ford) is the leader of the Ontario PC. One of the big issues is the increase in electricity bills that has been blamed on climate change action, when its really due to a whole bunch of things (big nuclear refurb bills, drops in electricity usage, selling excess power at a loss to the US etc.).
France missed its emission reduction targets last year, what politicians
say is usually relatively meaningless (Obama was a true genius at this), it's what they
do that counts. Our Canadian PM seems to have learnt a lot from Obama, as has Macron. If both redirected the extra money that they are giving the military toward renewable energy projects we would all be a lot safer in the long run.
https://eandt.theiet.org/content/articles/2018/01/france-fails-to-meet-its-own-climate-goals-promises-to-double-down-on-carbon-reduction/Geo-engineering will continue to seep into UN FCCC process, as its the only way to reconcile continued growth, taking money from the fossil fuel lobbies, and controlling global temperatures. I am not supporting that approach, which I consider to be a form of societal insanity, but have to accept the reality of our current political and economic system.