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Politics : Politics of Energy -- Ignore unavailable to you. Want to Upgrade?


To: The Vet who wrote (7385)4/21/2009 1:05:17 AM
From: Eric  Read Replies (2) | Respond to of 86356
 
Neither is true, so what is the process that causes the earth to cool again and CO2 levels to drop? It has never been explained, but I am sure it wasn't a carbon trading scheme organised by past civilizations!

Asteroid impacts, major volcanic activity.

It has happened in the past.