Estimating long-term trends of atmospheric temperature from near-urban
temperature data sites is technically very challenging because of all
the corrections that need to be made to account for issues like the heat
island effect. Surface data is an interesting contribution to the
overall picture, but far from definitive, there being rural stations
around the globe that have recorded no temperature increase in the last
100 years.


--
Spike

Here we go again. I really don't know if i can be bothered dismissing this extraordinary paragraph - we've been round these arguments so many times before. The game is up, Spike.

Julian Mayes