| http://www.w3.org/ns/prov#value | - Using the same techniques, modern scientists have made measurements and found that CO2 concentration hasn't changed a whole lot.One very important point of these experiments is that they once again show that proxies, such as ice cores and tree rings, are fairly inaccurate--they can show some trends, but the notion that they show accurate numbers is rather absurd.This is not to say CO2 may be increa
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