@malcircuit @artemist Politicians could literally flip a switch to do that.
Make internal combustion engines illegal in semi-trucks by 2034, and phase out fossil fuel power plants in the same timeframe.
Take half of military budget for huge subsidies for research, manufacture and buying of electric trucks and renewable power plants.
This would yield results in a few years, not a few decades. ¯\_(ツ)_/¯