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‘Climate change is here’: Experts warn global crisis is decades ahead of forecasts
(www.independent.co.uk)
Discussion of climate, how it is changing, activism around that, the politics, and the energy systems change we need in order to stabilize things.
As a starting point, the burning of fossil fuels, and to a lesser extent deforestation and release of methane are responsible for the warming in recent decades:

How much each change to the atmosphere has warmed the world:

Recommended actions to cut greenhouse gas emissions in the near future:

Anti-science, inactivism, and unsupported conspiracy theories are not ok here.
Climate change can't kill us all unless we hit some strange runaway effect that wasn't triggered when atmospheric CO2 levels were higher 500 million years ago (although the sun was 5% less bright back then). There might only be a couple million people hanging out on tropical Antarctica, but they could survive.
Humans are hardy; our species survived the ice age and the accompanying desertification of Africa with just some sharp rocks, our species can survive a mass extinction event with all our modern science and technology.
No, if we die out entirely, it will be fascism that does it. Shitheads that would rather burn the last remaining footholds of human survival than let the future exist outside of their control.
Humans will survive, civilization won't. And since we already dug up and burnt all fossil fuels that are reachable with primitive methods, it might not be possible to jump-start development beyond medieval tech ever again.