EPA’s Own Graph Shows Warmer Periods In The Past, Along With Higher CO2 Levels
Here’s an illustration from the US Environmental Protection Agency (EPA) showing 11 cycles of global warming and cooling over the last 800,000 years, over a temp range of 30 degrees. Notice that CO2 levels have gone up and down just as dramatically as the temperature. The cool eras tend to be much longer, while the […]
EPA’s Own Graph Shows Warmer Periods In The Past, Along With Higher CO2 Levels Read More »