[Phys-L] Re: global warming

[anngeorg at PACBELL.NET (Bernard Cleyet)]

"... since there are plenty of historical and fossil records to show that the earth has undergone even larger climate swings over the centuries."


And in a single 100 years?

bc


Richard Tarara wrote:

> The problem remains, however, that it is very difficult to lay the 1 degree
> rise in 100 years directly on human activity since there are plenty of
> historical and fossil records to show that the earth has undergone even
> larger climate swings over the centuries.  Europe has yet to fully recover
> from the mini-ice-age of the 1400s (I believe that's the century).
>
> Of course, there is the possibility that, in fact, the earth is in a
> 'natural' cooling period and that human activity has contributed MORE than
> the 1 degree rise.  ;-(
>
> Rick
>
> ****************************
> Richard W. Tarara
> Professor of Physics
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