Cactus on 25 June 2009
It's possible, but maybe it's simplifying the issue too much. Older fridges and air conditioners have slowly been phased out due the issue that you've suggested, so we know that it's a contributing factor.
Pollutants rise into the sky and during hot summers, when the sun's rays are really strong, there is more of an effect in urban, industrialized areas. That's why every summer here in Toronto, we have about a dozen smog warnings where we are advised to stay indoors due to the adverse effects of the sun/pollutant mixture.
I think that I veered slightly off topic, but what I'm trying to say is that, in my opinion, pollutants must have an effect, just like built up latent heat does.
