Thanks Paulus,

The word 'Challenge' relates to the challenge of obtaining the raw
data, rather than implying that we have a challenge and responsibility
to reverse global warming.

On the subject of Global Warming, I have an open mind, and I'm
searching for raw data to draw my own conclusions.

I will check out your suggested source above, in the meantime I found
the following site which has already done some of the leg-work for me.

http://www.john-daly.com/stations/stations.htm

Needless to say, on a global scale the results are less than conclusion
either-way.