Mitch Haley wrote: > > David Brodbeck wrote: >> Any ham will tell you sun spot activity increases and decreases on a >> 22-year-cycle. Are you saying there's a similar 22-year cycle of >> temperature increases and decreases? > > I can remember the nature magazines telling us that global cooling > was caused by humans, seems like that was around 1970.
There actually *is* a "global cooling" effect caused by fine particulate pollution. The sunlight hitting the earth's surface is measurably dimmer today that it was in the past because particulates in the atmosphere reflect some back out to space. Global warming is compensating for its effects and then some, though, and the effect is diminishing as more particulate pollution is eliminated.
