To: Brumar89 who wrote (75697 ) 3/25/2017 4:09:04 PM From: Maurice Winn Read Replies (1) | Respond to of 86356 So, the question I put to you is this: After reviewing the information above, and perhaps doing your own research, what would be the ideal concentration of CO2? 537 parts per million. Then plant crops will be able to produce enough cellulose for combustion to fuel the power stations needed to supply 300 million uberized electric autocars. 300 million x $10,000 = $3 trillion = a very big economic opportunity for making them. The 7SSS* business will be big too. As will the electricity supply business. But photovoltaics might do better than cellulose - as is the case so far with photovoltaic prices still dropping. We probably won't get to 537 parts per million before Peak People makes it an impossible target. In a third of a century, we've manage to increase CO2 from 340 ppm to 400 ppm . Another third of a century should get us to about 480 ppm. But the big human die off will begin in 20 years. With continued technological improvement such as in photovoltaics and autonomous uberized electric cars and drone deliveries, buying of petrol and diesel will head towards zero. With good 3D and stereophonic sound, the desire to travel might be greatly reduced too. Why crowd around tourist cities when 3D fibre can take you there, apart from air temperature, smell and being knifed or run over by a jihadist? When there are only 2 billion people, using a lot less fossil fuel per person, they might find that the absorbing and disposal of CO2 by the ecosphere exceeds the output capacity of people. Peak CO2 should be, umm, let's see. Hmmm. Actually, it will probably be 537 ppm. That will occur in 2057. The current projections of Peak People [demographers don't predict a peak, just continued growth for this century] are wishful thinking. Nature is cruel, merciless, relentless with vagary thrown in for luck. A tsunami from a bolide, or nuclear war, or an H5N1 humanized flu or similar, or trade wars, blockades and economic disruption, or horrific civil wars such as Rwanda's, or regular large scale land wars, or reglaciation starting in 2020, could introduce Peak People to a place near you any time from now. Mqurice * seven second swap stop to enable nearly instant car recharging.