Quote:
Originally Posted by photon
There are various sources. Ice cores with trapped air bubbles can be measured directly, and there's various proxies for CO2 and other gases in sediments, rocks, etc.
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Ya I guess I just don't understand how they can be 100% certain that these air bubbles haven't been effected by sitting in ice/rock for 1000's of years. Do we know for sure that in 4010 when they take air bubble samples for 2010 that they could show the same CO2 levels that were actually present in 2010?
I'll be the first to admit I know nothing about this stuff besides what is said on the TV, movies and the paper which seems to be conflicting at the best of times. I'm not the type to believe humans aren't messing with the Earth but I think at times it might be blown out of porportion because we don't have enough evidence. For a planet that is 4.5B years old it seems wrong to draw conclusions from 2,000 years worth of data....a percentage I wouldn't even want to try and calculate.