Here's an interesting report by Monitor News Service about the change in climate and man's effect thereon.
"The task of piecing together the vast puzzle of how the earth's weather changes has new impetus these days. More and more, scientists agree that current weather changes are connected to man's search for more food and more energy. Not only does weather affect food, but energy use and agriculture affects climate."
Keep reading.
"The direction and the extent of these effects remain a mystery which scientists want to unravel. So far, as they strain some of the world's largest computers, study satellite photos, and launch large-scale atmospheric experiment's, the practitioners of the new science of climate change cannot agree where the different pieces of the 'puzzle' fit."
Don't stop reading. We're going to make a point.
(Skipping down several paragraphs ... )
"Scientists already have established that waste heat from large cities can change local climates. In Washington, D.C., the frost-free growing season is one month longer than in outlying areas, Dr. James Peterson of NOAA has found. Also, cities average as much as 10 degrees warmer and have less snowfall and fog than rural areas. ... beside putting out heat, burning coal and oil pours vast amounts of tiny particles - aerosols - into the atmosphere.
Yeah, yeah; now to the point ...
"This could account for the worldwide cooling trend since 1945, which has spurred widespread speculation about the return of the ice ages ... "
Huh?
(The article was published 2/10/75)