Some ideas for positive action:

"What can a technologist do about climate change?" https://news.ycombinator.com/item?id=10622615

(Spoiler: Be engaged, be influential, use your high-leverage superpowers)

Try to calculate your carbon footprint, then take steps to reduce it where possible. For example, taking fewer airplane flights.

If everybody murdered someone else, that would help a lot. More would be better.

Also helpful: don't have children, don't drive, don't fly, don't eat meat. Plant trees. Erect solar panels.