As I've said before certain people are allowed to get [selectively] political on the forum because the thing that will kill us all the fastest of all, from the inside (Rome fell first from the inside), will be the utter tyranny (the utter anarchy of chains and contractions) of Utopia (of Orwell's Dystopia). You've picked the most perfect road to the totalitarian state and Armageddon in 'Environmentalism' without any alternative future or choice for freedom from an all encompassing (totalitarian state) communism of Earthly Utopia.
My answer and alternative: Initiate the Space Age as the greatest imperative of humanity and life soonest. Colonize space, therefore opening space wide open to a nova-like expansion of life from Earth. Once begun, even forcing it if necessary. Sure it's warlike. Nova-like explosion outwardly is a far better, far more benign, future than blackhole-like implosion inwardly. Divide outwardly or divide inwardly. Division in expansion outside is the only physic, absolutely the only physic, allowed by nature for unity inside and, therefore, a greater prosperity and peace for the greater many.
You (the general form of "you") can dream all you want of some kind of Utopianization of Earth (communally Utopian peace of Earth). All you will get from the actual pursuit of it, from even trying to chain all mankind to it, will be a utopian matter of dystopian anti-matter and holocaust.
I wonder if this lesson and truth of history will be allowed to stand here against a fog of utter dreaminess and denial. The only way the Earth becomes a fantastically great New Frontier is if it becomes an integral part of a fantastically greater New Frontier.