On 17 Mar, 18:59, Tom Anderson wrote:
On Fri, 16 Mar 2007, JNugent wrote:
wrote:
On 16 Mar, 08:52, Mike Hughes wrote:

...I believe that there is currently too much emphasis on this and not
enough on other aspects of pollution, which may cause us more damage
than any (natural) warming may do.

(I'm a cause-of-climate change sceptic, BTW. Clearly it's happening

How does anyone know?

Er, measurements of temperature?

For how long, at which locations, at which frequency and at what accuracy
have measurements been taken?

There are detailed and reliable direct temperature measurements going back
to the late 19th century.

as to how reliable is subjec to debate...


There are also indirect measurements, such as
trree ring widths
which tell you if it was a good year or a bad year; not terribly
accurate is it?

This is all in the IPCC reports, and is covered rather well on wikipedia.
that font of all accurate knowledge...

Unless there is an explanation for the increases in the last 400 years -
or 4000 years - and unless it can be distinguished from the reasons for
the alleged increases in recent times, the whole business (a good word
to use) is so much hot air.

There is. Go and read about it.

people have been; but anyone skeptical of even any part of the GW
argument seems to get abused hurled at them...

Fod