re: Human beings pumping untold amounts of particulates into the atomsphere is having a significant impact.
You'll probably enjoy this then:
http://ozonewatch.gsfc.nasa.gov/
I think a lot of what we're seeing in the weather is the result of these holes we have blasted open in the ozone
In any case, it makes good sense to get away our economy off of carbon fuels as best as possible and on to renewables,
including nuclear electric