The US didn't give up. Trump purposely killed the funding for clean energy because Big Oil donated $75-100M to get him elected.

correction: they may have spent $450M: https://climatepower.us/news/new-report-oil-and-gas-industry...

Exactly. And it wasn't a secret either. He shouted 'drill baby drill' at any opportunity.

And then the Americans elected him in a landslide.

They gave up.