Antarctic Ice Sheets Formed While CO2 Was 600 ppm

Currently CO2 makes up about 390 parts per million of the atmosphere. The assumption of the global warming alarmists has been that a doubling of CO2 from pre-industrial levels, from about 290 ppm to about 580 ppm, would drive the world over a ‘tipping point.’ So much heat would be captured, they claim, that the atmosphere would warm by as much as …

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