DAR, I posted elsewhere on the site re climate change, "Over population is the real issue, but business and politicians will never buy it because the capitalist model requires growth. Growth until when?" Concentration purely on CO2 is not a solution. Farmers readily see the effects of over stocking. Have you ever flown over the endless fields of agriculture that stretch from one horizon to the other 360° and wondered what was there before? Forests generally are the lungs of the earth, keeping the ground water low enough so that the land doesn't become useless from salt migrating to the surface, respiring O2 to the atmosphere, and acting as the earths refrigerator/air conditioner by the evaporative cooling of water from leaves. Walk into a forest on a hot day and see how the temperature drops. Yet we have all this agricultural land baking in the sun when not under crop and saying it has no effect on climate, likewise all the concrete and bitumen we've poured over the surface, glider pilots love barren land.
Sadly, we humans think we have dominion over all on earth, as per the Bible, someone gets taken by a shark and the cry goes out by sections of the community to get rid of sharks, humans have primacy. The understandable, biologically speaking, human need to procreate, but without any means of controlling growth. And we go to the extent of utilising medical science to achieve pregnancy where it wouldn't otherwise occur, so a couple may feel fulfilled. Pollution - plastic in the oceans killing all manner of wildlife, from the largest whales to the smallest fish. Desecration of species, we fail to understand that one particular plant may depend solely on one species of bird for its existence, and vice versa. But how do you control human population? Nature has it worked out, if there is an explosion in a particular species, its prey explodes as well in sympathy, until each is restored to a balance. We have no prey. Bit soap boxish, sorry.