Description: |
A six-step explanation for why increasing CO2 is a significant problem (without using climate models). The six steps
describe the natural greenhouse effect, how trace gases contribute to the natural effect, how trace greenhouse gases
have increased due to human emissions, why radiative forcing is a useful diagnostic, that climate sensitivity is around 3
degrees C for a doubling of CO2, and why "radiative forcing X climate sensitivity" is a significant number. [Source: RealClimate: Climate science from climate scientists]
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