Carbon Dioxide: no big deal.

Looked at in terms of the ECS value, atmospheric water vapour increases the CO2 climate sensitivity slightly from 0.45°C to 0.5°C, and any "runaway overheating" is shown to be impossible. GRAPH: Carbon Dioxide: no big deal GRAPH: Carbon Dioxide: no big deal GRAPH: Carbon Dioxide: no big deal PHOTO (COLOR) PHOTO (COLOR) As the CO2 level begins to rise, along the horizontal axis towards today's figure of 400ppm, the line curves upwards steeply, to produce about a 6°C rise in temperature for 400ppm of CO2. [Extracted from the article]