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Politics : The Environmentalist Thread

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To: Peter Dierks who wrote (6888)	7/6/2006 5:04:40 PM
From: maceng2	Read Replies (1) of 36917

The change in visibility over the years is documented in minute detail. The period I was talking about is between 1912 and 1982. Yes, of course I agree that volcanoes, forest fires, various natural events will cause particulates to be ejected into the atmosphere. Human industrial activity is (has been) a cause of particulates in the atmosphere too. Both these processes effect visibility. The current levels of mercury in surface dwelling fish is primarily caused by fossil fuel burning power stations. Some of those power stations are in China, who are commissioning about one new power station a week if I remember correctly. The fact is though... human activity can effect global trends, and should be studied closely. The steel used in radiological experiments often uses steel from sunken warships from WW1. The reason is that steel produced after 1945 has more background radiation from above ground nuclear detonations. Fortunately it's been agreed to put the brakes on that activity.

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