On 1/7/10 12:17 PM, Eric Gisin wrote:

But what people don't know, say the scientists at Intellectual Ventures
labs in Bellevue, Wash., is
that the carbon dioxide level some 80 million years ago - back when our
mammalian ancestors were
evolving - was at least 1,000 parts per million. In fact, that is the
concentration of carbon
dioxide you regularly breathe if you work in a new energy-efficient
office building, for that is
the level established by the engineering group that sets standards for
heating and ventilation
systems.



If there weren't so many billions of people on the planet needing
fresh water, and 1.3 billion living at almost sea level, going up
to 1000 ppmv for CO2 wouldn't be such a problem.

If ecosystem change slowly enough, many species adapt. Fast
changes usually result in mass extinctions.