Walter Williams on Environmental Predictions

This article by Walter Williams looks at some of the environmental predictions of the past century. In the last paragraph he mentions that the greenhouse gases are 95% water vapor.

Stands to reason since 70% of the earths surface is covered by water. If we completely eliminate all the auto exhaust and cow farts, we would still have significant and very important greenhouse gases. If we double our output of manmade gases they will still be puny when compared to the total.