gbaji wrote:
The reality is that over the last 5-6 years, global temperatures have been cooling, not warming.
Source?
My quick research seems to indicate there has been no significant variance in temperature over the last few years. But that means no measurable change has taken place. Neither up nor down, which you claim.
Over the long term (as in millions of years) there were apparently periods of higher CO2 concentration than we have now. So it may actually be a natural fluctuation. On the other hand, there never was so much burning of fossil fuels, industrialisation and all. And there is correlation between CO2, temperature and human emissions. I agree that it does not necessarily mean (full) causality.
The thing is, previously there were no humans that could have been negatively affected by CO2 or temperature fluctuations. Now there are. Ask the people living close to the sea etc.
On top of that, burning all the fossil fuels and other pollution we cause does not only have an effect on atmospheric CO2 concentrations (and just maybe on global temperature with all its consequences). Fossil fuels are not renewable. We need another source of energy in the mid to long term.
Particulate matter concentrations in cities with little emission control lead to respiratory diseases.
There are economic dependencies and political pressures associated with fossil fuels (ask any Iraqi).
So there are a lot of arguments against burning fossil fuels other than CO2 emission. Just saying "Humans have nothing to do with atmospheric CO2 or global warming, let's keep doing what we do." won't exactly help that cause.
Edited, Jun 20th 2009 11:42am by Turicus