If you do a search on global warming,
you will find sites that say the scientists are actually split
50/50 with a few more leaning towards natural causes.
I have my own theories, but I am not a scientist, just an engineer.
I think the following:
1 - GW is natural and man made.
2 - Natural in that it has been shown that sunspots (solar activity)
is linked to our weather.
3 - The Earth is always in natural swings in weather.
4 - Exhausts are less than volcanos and natural gasses released by decaying
matter and uranium (radon gas)
5 - man made - we have affected the natural wobble of the Earth by
mining iron, rock, coal and other items. Think balancing your tires,
a little piece of lead placed strategically changes the ride of your vehicle.
Now think of how much material was mined and moved from one place to the other.
Like I said, I am not a scientist, just an engineer.
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  Bottom's up!!!
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