This is apparently not directed against carbon, but N2O, which is another greenhouse gas.
It's something I've heard preciously little about, and therefore I'm surprised that many countries suddenly are seeing this as an extremely urgent problem almost simultaneously.
Perhaps you’ve heard of smog? Clouds of which used to linger over Las Angeles and at some points even became concentrated enough to kill some sensitive folks?
It doesn’t consist of anything because of strict air quality standards started in the 60’s. N2O was in fact one of the constituents of smog, and while it might be one of the more fun ones, chemically/recreationally speaking, it’s not great for the atmosphere.
It's something I've heard preciously little about, and therefore I'm surprised that many countries suddenly are seeing this as an extremely urgent problem almost simultaneously.