[Beetle01]

could you please Provide a link to these 650 who oppose GW?

650 people, compared to 90% of the scientific field still doesn't hold much water.

If you would read some scientific magazines are articles you would know that CO2 levels, and temperature changes can be found in ice core samples from glaciers.

It's true that CO2 levels have been higher in the past, and have varied greatly, but those changes in CO2 occurred over a long period of time, some thousands of years, compared to the century or so this warming trend has occurred in. The earths atmosphere will absorb the excess CO2, but it cant do it at the rate we are putting it into the air, so to answer old schools question, thats why this cant be only a natural cycle.

Article that may shed some light on how they know this isnt natural, and how they know past cycles.

http://www.reuters.com/article/environme...=0&sp=true

Post #5 has the link you're looking for.

Also your article clearly states they only go back 610,000 years. A small hiccup in the history of this planet.