Here it is again, ambiguous comments like "there are growing signs" or "they say", so please explain what the growing signs are backed by actual evidence that spans a period of time valid to the arguement.

The only signs of man's stupidity relate to heavy airborne pollutants, water pollutanmts etc. None of which is proven to cause the "alleged" global warming.

P.S. I just want to remind you that we humans are indignenous to this planet and therefore anything we do to it is natural, just as cows and horses and indeed all animals generate methane, yes another "global warming gas" If we decide to deforest the entire planet it is a natural occurance because we are natural.