From: John Beckett 

"Geo."  wrote in message
news::
> Lots of parts of the world have gone thru the industrial revolution already
> and the change was that the CO2 content in our atmosphere increase by 0.002%

All you've said on this topic is that YOU don't understand how a tiny
percentage of CO2 can influence global temperature. I can accept that.

But now you're using specific numbers that are nonsense.

CO2 is now about 380 ppm of the atmosphere, whereas is it was about 280 ppm
(estimated), before the industrial revolution. So CO2 has increased from
280 to 380 ppm (35% increase).

The reason that a tiny proportion of CO2 is important is:
- The PROPORTION is not relevant.
- It is the TOTAL that matters.
- The total is about 3E12 tons of CO2
  (3 times 10 to the power 12, i.e. 3 million million tons).

The large total amount of CO2 means that there is a very good chance that
any infrared radiation leaving earth will hit a CO2 molecule. The impact
means the radiation is absorbed and re-radiated in random directions.
Because CO2 is rarer at higher altitudes, the net effect is that radiation
that would have escaped to space is now redirected down to earth.

John

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