Here is a NASA report to the contrary discussing glacial melting and sea ice melting. Obviously ice in water won't make any change in sea level, but the glacial ice would make a difference. Many folks say we can't have an impact on the climate. While I have no clue if we do or don't, I can't imagine we don't have any impact. I've sailed across the Gulf of Mexico a few times to Mexico and I was amazed at how much crud there is in the water in the middle of nowhere, 3 or 4 hundered miles from land.
When I lived in Saranac Lake NY in 1980 I did a lot of camping and canoeing in the lakes there. There was a small pond called Green pond I think off of St Regis Lake that was crystal clear. Apparently it was one of the early acid rain lakes. From what I hear there are now 600 lakes similar to this up there that are pretty much dead lakes. I don't think there is any question we have an impact on our environment, what is not so clear is how much.http://www.cnn.com/2008/TECH/science/12 ... index.html