Re: OT Q re Global warming.

Joel wrote:

I believe human activity has a minimal effect on the climate. Human
activity has raised CO2 levels from about .03% to .04% of atmospheric
composition. These levels are very, very low compared to most of the
planet's history. Earth has experienced long ice ages with CO2 levels
much higher (10x or more) than they are now. In recent history, Earth
went through a "Medieval Warm Period" where average temperatures were
higher than they are now despite slightly lower CO2 levels. The
variable, cyclic output from the sun, as well as variations in Earth's
orbit and axial tilt are the most important factors in climate change.
Atmospheric composition comes in at a distant fourth, with water being
by far the most important (and consistently unmentioned) greenhouse
gas. Technically speaking, the scientists aren't lying when they say
CO2 is a greenhouse gas, but what they are doing is overstating its
effects.

And I believe that if we don't stop polluting and start finding some
renewable energy sources, our grandchildren are going to be suffering
the consequences. It's easy to stop polluting unless you're a big
petro-chemical company (in which case it's costly); it's easy to
recycle; it's easy to find energy that's free (sun/wind/surf/geothermal)
if you have the money to buy the conversion tools to make electricity.

We just have to step up and get free of oil - other countries have
already succeeded. We could be leading the way by making every new
building in CA an energy source rather than resource draw.

.

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