conservation of habitats (rain forest)

Peter Taggart
Tue, 27 Dec 2011 21:09:15 PST
This is more what worries me as a bigger picture. I am unclear what
triggerd the climate changes in north Africa, causing the Sahara Dessert
Where I believe 2000 years ago there were grain fields? However climate
change on a major portion of a continent mus surely affect wider weather
systems? an even more frightening prospect than loacal ecological disasters
to my mind.

On Wed, Dec 28, 2011 at 3:47 AM, lou jost <> wrote:

> The most disturbing thing about the  Amazon basin is its climatic
> instability. Recent studies suggest that if mean temperature goes up just a
> little, or precipitation declines, the climate will pass a threshold and
> the forest will revert permanently to savannah, with no hope of returning
> forest. Because deforestation increases temp and decreases rainfall, the
> area is headed towards this threshold at an ever-accelerating rate. The
> future does not look good.

More information about the pbs mailing list