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.
Because it's all meaningless propaganda and is meant to not reflect, talk about or address reality at all.
Which is why it's so toxic for society. Fiction's supposed to mirror or discuss important aspects of real life, but it doesn't anymore, and because of it, people have no guidance, and society crumbles.