Hm, for me, fighting climate change is something I'm starting to look vaguely optimistic about.
Some people are very defeatist there - china is just going to pollute more for every reduction so nothing matters and similar arguments. And yes, germany has messed up a lot by exiting nuclear power before exiting coal, but the nuclear train over here is gone. And yes, it's going to be hard, and we'll probably miss the marks and all our lives will change with it.
But on the other hand, looking around in Germany and Hamburg, there's lots of projects starting, progressing or even maturing aiming at reducing the use of fossil fuels. It starts to feel like a lot of systems are starting to slowly start moving.
For example, our local district heating provider is hard at work getting local industries hooked up to re-use their heat, we might see our first geothermal heat plant this year or next year (and it didn't take that long to work), they have concrete plans to replace their last coal-powered heater with several new green systems including one I have to read up on - some station to extract heat from the Elbe herself. Other plants are designed with green hydrogen in mind.
German car manufacturers are finally starting to apply their experience to electric vehicles. The local public transport is trialing electric busses. Recently there was a post on reddit of someone electrifying an asphalt laying machine. The city is funding a project to support EV charging ports in underground garages, which is supposed to dump the surplus of solar and wind power into electric cars when we have it and to throttle the charging of EVs past a certain level if we don't have surplus power.
We're also seeing different prototypes for large-scale power storage being built and going online. Are they all going to work? I don't think so. Are they the solutions we will use in 5 - 10 years? I also don't think so. But the best way to quickly get two good ideas is to try a dozen bad ideas and toss most of them when they fail.
Also interesting, a lot of different new, and established companies are starting to experiment more and more by diversifying their goods with vegetarian alternatives, or entirely new vegetarian ideas. And sure, it would have a bigger impact if half the world crashed straight into veganism, but that won't happen. And then I'd be happier if campaigns and goods like this gradually reduce the overall meat consumption.
I don't know if we can steer the crazy planet heating and climate back into a safe situation. Probably not. But it starts to feel like a lot of systems especially in Europe are starting to engage the problem at many levels. And that's a lot of scientific and engineering minds suddenly looking at the practical problems and doing something about it.