Gaia hypothesis is a classic example of anthromorphism (in this case, about the earth) combined with new age bad science. Personally, I think the indications are humans will simply move to more technologically challenging and renewable energy sources.
Fossil fuels (including wood and coal as well as hydrocarbon based liquid fuels) powered the great industrial revolution of the last 200 years, but they are realtively crude sources of energy. Look out for terrestial and space based solar power, fuel cell technology and fusion power.
Its interesting that you post such a comment JAH, because to me it seems like a perfect statement of a philosophy that is a sort of Hobbesian Malthusian luddism - which is an arguement used normally by reactionary forces to justify the entrenchment of an elite. In that,
I think you've touched on the principal problem of being "left" these days - its capture by an urban liberal bourgeoise that is it fact deeply conservative, afraid and reactionary in its nature. That capture is manifested in the smug support of Saddam Hussein (since when did the left oppose overthrowing a totalitarian tyrant?) in an insistance on linking a liberal social agenda to a socialist economic program, a bourgeoise desire for ideological compromise (no, a true left winger cannot condone Muslim - or Christian for that matter - religious oppression of woman. The values of the left are universal!) and middle class capture of the state apparatus.
Change (political, economic and social) and technology are weapons of the left, not its enemies as you imply JAH. Let's be true hiers to Orwell - support the enlightened liberation of Afghanistan from feudal theocracy, support the defeat of tyrants everywhere from the Washington to Baghdad to Riyadh and lets use technology as a tool to liberate people everywhere!!