But are climatic factors so localized that we can break it to town/city levels. I guess it is a cummulative spatio-temporal contribution that changes climate. However the pollution levels can be very localized and can follow spatio-temporal pattern independent of climate.

Thank you!

But Kenneth don't you think that the higher levels of cO2 have fluctuated on geologic scale and in that case what role population is likely to play.

Thank you Mr. Kenneth, Mr. Saif