Man-caused climate change is real, but it isn’t an existential crisis. It’s not going to destroy human civilization like a nuclear war would. Climate change will greatly damage economies and kill a lot of people, so it’s a serious issue that needs to be dealt with, but it isn’t existential.
Technologies like solar and windmills are good, but have trade offs. Many rightwing arguments like how inefficient these technologies are or how many birds they kill are based on original versions of these technologies that have been greatly improved upon; so these critiques are no longer valid and people making them either are ignorant on how outdated their information is, haven’t done their due diligence, or are being dishonest.
Cost benefit analyses on the benefits of reducing carbon emissions have already been done, and they overwhelmingly show that reducing emissions is worth it. However, it is only worth it if we cut emissions slowly. Cutting too fast likely makes the costs of cutting greater than the benefits.