re: Can you link all the observed global changes to the amount of "greenhouse gasses"?
Can the greenhouse gasses explain why there seems to be an increase in the magnitude and frequency of earthquakes?
Can the greenhouse gasses explain why there is air escaping from the Earth's atmosphere?
There is no question that the climate is changing, but is it simply a coincidence that large lakes are disappearing after humans started using nuclear power in bombs and elsewhere?
It seems to me that the volcanoes are becoming more active. Does the "greenhouse gas" explain that effect?
Greenhouse gasses do not explain the disappearance of the ozone from the polar regions?
Although mid-latitude and Arctic depletion has also been observed, the loss is most dramatic in the lower stratosphere over the Antarctica continent.
from the above link
The addition of greenhouse gasses to the atmosphere can not explain all these effects, but the reduction of the atmospheric density can.