If CO2 produced by industry is causing global warming then wouldn't there be hotspots above major industrial sites where the CO2 is most concentrated? And wherever in the world CO2 is washed out of the air by heavy rainfall, shouldn't there be CO2 coldspots too? If CO2 warming is increasing average wind speeds then are the increases in wind speeds around CO2 hotspots greater than elsewhere? I read on wikipedia that if the earth warms up then more water vapour is produced and this in turn leads to more heat being trapped and more water vapour forming and so on.What stops this positive feedback cycle from getting out of control? Do clouds form when the air reaches a certain humidity level and do the clouds then reflect sunlight back into space?