Saudi Arabia now consumes more oil than Germany which has three times the Saudi population. It is consuming a quarter of its own production. By 2040s, the Saudis will be a net importer...
Gorvachev held his ground on this point while discussing with the Iron Lady back in the 1980s: The world cannot consume at the same growth rate as developed countries; there are not enough resources. But Soviet inefficiency was as bad of a calamity as his opponents' capitalist consumption goals.
Alternative energy just stopped being "Green". It is It.