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Even the New Yorker has lost the plot | The climate silence is coming from inside the house.
(www.climatecoloredgoggles.com)
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.
I'm not sure "percentage of fictional stories in which climate change plays a major role" is a very important metric.