Or maybe there are not enough benefits for the US to fight climate change?
The US sees itself as a "force of good" through its influence on the world with its military.
But the US is very bad about CO2, and sometimes I have the feeling that climate change will probably be the reason why the US might lose its superpower status.
> But the US is very bad about CO2
You should probably drop the "but". The US seeing itself as a "force of good" doens't make it one.
> But is used to connect ideas that contrast. https://dictionary.cambridge.org/grammar/british-grammar/but
The way it's phrased puts "sees itself as a force of good" in contrast with "is bad".
"Is bad" doesn't make sense to be in contrast with "sees itself as...". It's more likely that it's "good [through influence/military]" in contrast with "bad [in CO2]".
Alternatively, perhaps it was meant as "(sees itself as) bad [in CO2]" but that's not much of an argument about anything.
It markets itself this way both to the world (largely unconvincingly) and to its populace (largely convincingly), in order to mask the military industrial complex that funnels tax dollars and new debt dollars to a handful of corporations and their shareholders.