I don't think most governments are going to do anywhere near enough about climate change, resource depletion, and other intersecting problems - even the ones that have signed up to the Paris Accords. I concluded a couple of years ago that the only solution was to take steps to increase my personal resilience to climate change, and that of my local community.
How to do this? Well, for a start, take a look at where your house is. If it's coastal and near sea level, or in the flood plain of a river, or along a coast that usually gets hurricanes, or in an area plagued by drought, well: it's probably not going to get better from here. Move to somewhere uphill from the flooding/a place that gets more rain/etc, or make peace with the fact that your house will probably be destroyed in a natural disaster at some point.
Then, look at the areas of your personal life in which you depend on fossil fuels, environmentally unsound practices, and anything else you think might be a problem when climate change and resource depletion has progressed a bit more. Learn some more eco-friendly ways of getting those things. Even if you don't put them all into practice now, make sure you have the knowledge to, say, cook if the power's out for a few weeks/get some food even if global food supply chains break down/etc. Learn the plants, animals, and cycles that can be found in your home area. Figure out how easy it is to travel to nearby places without a car, and what your effective range will be in one day/one week/etc of foot travel or bike travel. Integrate yourself with the local community, so that people see you as a friend/someone to help rather than as a stranger/someone to steal resources from. FI is about financial resilience. To have the best chance of surviving future climate turmoil, you need resilience in your lifestyle and skillset, too.
Also, you can help your community as a whole by setting up sustainable systems in public areas. You won't be able to convince everyone to help combat climate change, but you can certainly plant a few things/figure out how to get water sustainably/improve the local soil quality, so that your area will support a higher number of people or a higher quality of life in the future. You could even try going into politics, if you have the personality for it.
Whatever you do, don't rely on governments or corporations to do anything about it. It's definitely an issue. Climate change is here. The ship for preventing it has long sailed, and the only thing left to do is ride out the storm.