Self-sustaining man-made things may be impossible, but as long as our ecosystem has a net influx of energy from the sun, it is possible to maintain a level of complexity above total entropy (chaos).

When the wind turbine reaches its end of life, if there are humans left on the planet with enough know-how, its parts and raw materials can be recycled.

You're right, anything that is a simply linear process (inputs from the environment, outputs to the landfill) is unsustainable. But if we can turn our linear process into a circular one, via recycling, then sustainability in that particular subsystem is possible.

"Sustainable growth" is an oxymoron. We do have to manage somehow to stabilize the population. That's where the scariest challenge really lies, because in all instances in the past that has been accomplished by disease and/or war.

Pitt, Joe, Sci:

This may be picky, but perhaps part of the problem is the use of oxymoron. I would include "Sustainable Development", a variant.

Similarly, Global Warming is only sound bite worthy, as it fails dismally at even suggesting the complexity of climate change. At best they are a poor choice of words, at worst, they are bait and switch or platitudes.

A meme that may be worth propagating is "sustainable change".

To me, sustainable change means that we can continue to evolve and develop but within the constraints of our resources. It may make the future more palatable, rather than the bleak prospect of picking over landfills and slopping hogs 'til the end of time. True, population is an ugly issue, but perhaps that is simply a sad part of the transition.

When I combine the remarkable things we have created over many centuries, in a highly resource limited environment, with what we have learned since, perhaps it just might be OK. Not BAU by any means, but not bleak subsistence either.

I know it's just words but think of "Yes we can". That phrase seems to have potential.

I must to stop now or I'll have to turn in my doomer membership.

We do have to manage somehow to stabilize the population. That's where the scariest challenge really lies, because in all instances in the past that has been accomplished by disease and/or war.

Most demographics agree that population will level off (or at least slow down to a very low growth rate) somewhere between 9-12 billion people, and this appears to be a result of a number of demographic and economic developments that are not actively the result of any population policy.

So there's some reason for hope on that front.