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At the current trajectory, the carrying capacity of the Earth is going to rapidly decline. One of the most pressing issues is the elevated level of carbon dioxide (CO2) in the air. By 2015 we will have about 3 Watts (per square meter) of forcing, which will elevate the temperature about 2 degrees Centigrade by mid-century. It takes around 50 years for CO2 emitted now to fully warm us, so we’ve incurred a very large future warming commitment. In other words, by mid-century America’s climate will likely be similar to Iraq now, and it will only get worse. This is a paradigm shift from excess CO2 in the air being a great liability, to it being an asset (fuel stock). We can live with a temporarily elevated level of atmospheric carbon (until it can be converted to fuel or food) by using the extremely low cost simple scheme of putting a small amount of aerosol into the upper atmosphere to dim the sun. Currently, very expensive greenhouse gas emission cuts are being prescribed to lower the CO2 level of the air. Not only won’t that scheme work, but the great expense is unnecessary. On our present trajectory, there will be famine, war, pestilence, and death in the near future as the carrying capacity of the Earth rapidly declines We need to start treating CO2 in the air as an asset to harvest. Brad Arnold
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