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On Microclimates
In article ,
Doug Freyburger wrote: songbird wrote: a large portion of desertification is from human activities like overgrazing cows/sheep/goats and removing covering forests for crops and firewood. some areas the moisture in the forrests is part of the local weather cycle. remove the forrest, change the weather... Humans have done a large but unknown about of that over the millennia. The Sahara used to be grassland, as was most of central Asia. How much was human grazing and farming and how much was natural climate change? Very hard to tell after the fact. What is "natural climate change"? The graph on http://en.wikipedia.org/wiki/Geologic_temperature_record#Recent_past indicates that the planet was "naturally" getting cooler. in China they are trying to reforrest some areas, but i'm not sure how much success they've had. i don't think they have enough moisture or organic stuff planted along with the saplings so they bake before they can grow. instead they probably need an approach like the one above that starts small and works up to supporting trees one step at a time. It would need to be done a step at a time. Getting grasses and shrub bushes then building generation to generation. -- --------- http://www.youtube.com/watch?v=hYIC0eZYEtI http://www.democracynow.org/blog/2011/3/7/michael_moore http://www.youtube.com/watch?v=eZkDikRLQrw http://www.youtube.com/watch?v=MyE5wjc4XOw |