Bill51:
You might also want to check your sources about the overall effect of manmade CO2 as a greenhouse gas. Since most people conveniently forget to point out that the primary greenhouse gas is water vapor and it contributes roughly 98% of the greenhouse effect and is in constant flux, and as a total of all greenhouse gases manmade CO2 only accounts for about .2%
hmmm... well... first, let's put things into perspective:
99% of all gas in the atmosphere has nothing to do with the greenhouse
effect or global warming (about 78% nitrogen and 21% oxygen).
that leaves 1% of all atmospheric gases that DO play a part in the greenhouse
effect.
and that means that the slightest change to this 1% can have possitively
dissastrous consequences. that 1% of important gases are:
Carbon dioxide
Methane
Nitrous oxide
Ozone
Water vapour
Halocarbons
now, water vapour is the biggest contributor to the NATURAL greenhouse effect.
that is, before human intervention, water vapour was "it."
HOWEVER, CO2 is "the most important of the greenhouse gases as it accounts for the largest proportion of the 'trace gases' and is currently responsible for 60% of the 'enhanced greenhouse effect'."
in other words, greenhouse due to water vapor is natural. greenhouse due to
CO2 is a a man-made phenomena because man-made CO2 is in
addition to
naturally occurring CO2. CO2 in the atmosphere has increased 30% since the
Industrial Revolution began (you could argue, i suppose, that this is just
a coincidence).
basically, we don't know exactly what will happen, but we DO KNOW that man-made
CO2 is changing the climate, the weather, and the world.
http://www.bbc.co.uk/climate/evidence/carbon_dioxide.shtml