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Rising heat is causing students to underperform across the globe
(www.latimes.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.
Obviously more testing is required! I used to walk to school up hill both ways and got the switch if I complained! Kids just don't want to learn anymore! /s
Also I remember how much it sucked in a building w/out AC, so with these new spring/fall heat waves I'd be dead. Lucky in the US we have a party undoing education for the mid-class/poor so that only the rich that do fuck all will get an education. Part of their "keep the work force dumb and working" agenda.