Doesn't seem like there is any foreseeable future where climate change can be addressed. It's not just the leadership of the u.s, but the citizens themselves reject climate change as a real issue. Hopefully I'm just being pessemsitic.
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But Americans do drive everywhere, and that's 48% of all transport emissions (just cars, not even counting trucks, with that it's more like 73% for all road transport). So yeah. Nobody gives a fuck.
General power production is currently 25% of total, we can fix that with hydro, wind, solar, nuclear. Plans are clear, they need to be put into action.
Agriculture is another 25% which will be a candidate for reduction once there's something more energy dense than diesel available to run every tractor and combine harvester in the world (currently looking like never). EV tractors are in the golf cart stage of usefulness. Not something we can realistically reduce by much if you want to continue eating food.
Home emissions are only 6-8%, but we can easily drive that to zero with induction cookers and ban of fuel oil heating, subsidizing heat pumps and district heating.
Of the 14% that is transport, cars can go EV and vans/trucks for city last mile delivery. Semi trucks should be replaced as much as possible by electric trains (good luck building that much rail though). On the other hand planes can't even ditch leaded fuel for piston engines yet, they're so far behind. Electric planes are a 1 hour flight time joke, hydrogen use is nonexistent. Sea shipping can go battery electric as well although it would be incredibly expensive.
How much we can cut down in the 20% that's emitted by industry is a good question that I have little insight into. I presume some chemical processes inherently release CO2, but there is a lot that can likely be done.