Founders Pledge has recently completed a large report on climate change, which recommends two new cost-effective climate change charities - the Clean Air Task Force and Coalition for Rainforest Nations. This is on our research page here (which also has a report on mental health and will be supplemented with a number of other in-house reports over the next few months). I know some EAs are interested in climate change and it is something we are often asked about. We have been relying on old GWWC research for a while so this should be a useful update.
It may also be of interest because both charities work on policy rather than doing direct work. Finally, there is some discussion of why we do not recommend Cool Earth.
Edit: there is also a discussion of the link between nuclear power and nuclear weapons that may be of interest to ex risk people
While a few years ago I would have understood, there has been a significant change on the Republican side. There are 43 Republican members of the House who have joined the Climate Solutions Caucus and are working on policy. Also, there's the Climate Leadership Council that is comprised of business leaders and fellow Republicans who are actively lobbying Republicans with success. I referenced the Climate Solutions Caucus above, so here's the Climate Leadership Council: https://www.clcouncil.org/
For future reference, in the interests of full disclosure I think it would be worth mentioning when you recommend a charity that you volunteer for it