Possible rant here
Like most other eco issues, in the end the real problem is the number of human beings overpopulating the Earth....and which countries, nationalities or ethnic groups are doing this.
Forget the politics, economy, religious problems etc - 56 million people in the UK taking a dump a day has an enormous environmental impact.
The introduction of non local products is what enabled the UK diet to become healthy enough for people to live as long as they do - they heavily oppressed the non local populations to do this though.
the urge to have more than just subsistence is largely what has made humans move beyond the hunter gatherering and sustainable farming lifestyles. If we chose to return to truly sustainable living many of the areas currently populated would become uninhabitable and issues such as seal and whale hunts by indigenous peoples would take on a different perspective.
Many of the indigenous peoples did/do seem to have more of an ability to balance the individual and tribal needs alongside the impact on their environment - though their lifestyles tend to be lacking in most of what, 3rd, 2nd and 1st world populations consider as essentials (including, unfortunately, recording equipment)....
Perhaps those of us whose over populations seem to cause the problems should step aside and let the indigenous have the Earth back before it's too knackered for anyone.
Partly the reasons I had a vasectomy at 23......