Ask HN: What can be done to prevent a climate catastrophe?

I saw: https://news.ycombinator.com/item?id=18181503 https://news.ycombinator.com/item?id=17698237 https://news.ycombinator.com/item?id=18163552 https://news.ycombinator.com/item?id=19736368 but i think every half year or even every month we should think this same problem again.