The gas with greatest greenhouse effect is water vapour; according to some reports over 95%.
A clear night in the desert is cold; heat radiates straight out. A cloudy night is warmer.
But also clouds reflect solar radiation; heavy cloud cover leads to overall temperature drops.
I remain on the side of the sceptics (NOT deniers) on global warming.
Yes, carbon dioxide levels are increasing. Man made? Possibly; what proportion?
Affect global warming? Possibly; what proportion compared to water vapour?
El nino appears to be moderating. This should lead to some cooling. How much global effect is caused by ordinary fluctuations like this?
Also - sunspot cycles, Earth wobbles, cosmic radiation ...
Question - how much greenhouse gas is released by an average volcanic eruption?
Question - how much does land clearing affect carbon dioxide absorption/emission?
Yes, it DOES appear that we are going through a global warming period right now. Is it a normal phenomenon? Will it reverse as a natural cycle? (Don't forget the fear of an ice age in the late 60s early 70s).
Having said all that -
Pollution is (almost certainly) NOT good. Reduction of smoke/gas emission is a sound aim.
Land clearing without reforestation is NOT good.
Apart from all else, we're running out of oil. This will have some effect on the above - but could lead to more coal burning to generate electricity to replace oil as "fuel".
Question - can nuclear power be generated economically (yes) and safely (maybe).
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