I get what they're trying to say, and it's very concerning, but the headline is slightly misleading. I think earth's hottest year would probably be during it's formation when the surface was molten rock lol
It's the hottest in 125,000+ years, likely several million, which would mean hotter than since modern humans first walked the earth. I don't think people much care that it was hotter during the Hadean Eon.
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.