It's dry - It's wet

[OAS]

The volcano reference is accurate. When there is a major volcanic eruption, it takes at least 3 years for the ashen pollution to dissipate from the atmosphere. Every major volcanic eruption in history can be linked to subsequent crop failures, larger than average winter death tolls and contamination of water supplies.

Long term shifts in weather patterns reek more havoc on the planet than anything man has done to it. Nobody is suggesting that the human race shouldn't change it's ways but they are a small impact to the planet. Other than a nuclear war, man will not destroy the planet. Dinosaurs were not wiped out by the industrial revolution, deforestation or auto pollution. As I said earlier, the glaciers melted with no help from mankind. The dust bowl was not caused by man, but has subsequently been prevented from happening again by man. Dinosaurs all but eliminated most vegetation where they roamed, far more devastating than all of the timber ever cut by man. But man replants his timber.

We find ways to adapt on this planet. The amount of pollution we spew into the atmosphere is nowhere near the levels it used to be. Living proof is the London fog. The famed fog was caused by the burning of coal stoves. The pollution spewing into the air at the turn of the 20th century was many time worse than today.

One major asteroid hit on the planet will wipe out civilization faster than man could ever find a way (other than all out nuclear war) do destroy it.

Now go hug a tree, say goodbye to it and cut it down so we can make something useful out of it before lightning or a forest fire burns it down and pollutes the air..