We don't want to do any of it.  

These days I am getting interested in low-tech personal survival techniques--organic gardening, closing nutrient cycles, and the like--things that can be carried out by small groups of people, on the assumption that humans may survive in North America.  

Then again we may not.  

Certainly, one way or the other, the thing we call Western civilization will disappear.  Even a decade ago I would have been looking for ways to correct our errors, but actually our errors are built in:  As we say in the computer world, they are features not bugs.  They will not be corrected, in defiance of any theoretical possibility of doing so.  

Our main scenerio is Infinite Downward Spiral--a.k.a. Easter Island.  This is the scenerio our civilization is actively trying for.  It is rooted in the obsession to continue Business As Usual, even after BAU has blatantly failed.  In this scenerio we use up today what we will need to have on hand tomorrow in an ever-going, progressive destruction of human life support.  It ends when desertification is so extreme humans can no longer muster the resources for further destruction.  Obviously, most of the population will have died off along the way.  

Despite our best efforts to destroy ourselves, we may fail at this if our political economy disintegrates in a rapid disorderly fashion.  For example, the one thing most likely to slow global warming is the collapse in oil demand that has followed hitting the wall of peak oil production.  If our economies can continue to fall apart, then global warming will be substantially mitigated.  

This example shows how disorderly (and unpredicted) collapse may render us unable to further destroy our life support and essential life systems.  Thus other scenerios besides Easter Island become possibilities.  

The Fates are kind.