You can also add cyclic solar events (sunspots) to the equation. There is a direct correlation between solar events and climatic changes on this planet. Methene gas from the wetlands is also an issue.
Undoubtedly we must monitor closely our impact on our planet, but much of the global warming argument put forward by the left is total nonsense, and has to do with them wanting a change to our economic structure and way of life and has nothing to do with a realistic scientific assesment of our planet's climate.
I think that finally more and more people are starting to see the GW issue for what it is....about time.
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