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Trump Administration Plans to Gut Clean Car Rules
(www.nytimes.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.
How do you enforce it? All it tells is the existing milage not usage.
Do you pro rate it? What if someone sells the car mid year?
Do you pay the difference next year? What happens if you buy the car someone drove all year as Uber but only said they'd drive 10k miles total? Nope you have a bill for 70k miles you didn't drive?
Gee only a few issues here.