What will their future be like? At the end of 2011, CO2 concentrations were roughly 392 ppm, writes Michael Mann. If current trends continue, we will have reached 450 ppm by 2030. This means we will have locked in a warming of the climate that's dangerous far beyond what we have thus far witnessed. Devastating sea level rise, more powerful hurricanes, more widespread drought, and increased weather extremes are the consequences, with terrible impacts on human life and health. We should have s...
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