Nasa study on Global Warming

[KenWittlief]

well, yeah - but doesnt that tell you the temp of the area where the core sample was taken from? The earth is huge, almost beyond the ability of a human mind to comprehend.

I just find it hard to believe you can extrapolate the average temperature of the entire earth from ice core samples taken from several locations, over a period of millions of years

esp when our state of the art weathermen cannot tell me what the weather is going to be next week? Im not convinced we understand the climate of the earth as well as we think we do.