Population is the biggest threat. If you spread the wealth evenly around the world, we in the west would be poorer (howdyalikethat?) and and the starving millions in 3rd and 2.5 world countries would be able to consume more. Net result, more pollution.

As I keep saying "we won't like the consequences". see above.

Reduce the population and you reduce the pollution. Not a solution that is ever going to work without starvation, pestilence or war. And they are all hovering like the sword of Damocles. As I said "we won't like.............."

Or we could limit families to one child for a while and end up with criminality like India, or a preponderance of bachelors (and prostitutes) like China. As I said "we won't like.............."

Science and technology will sort it all out. As I said "we won't like.............."