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Politics : Politics for Pros- moderated
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To: ManyMoose who wrote (494127)7/4/2012 8:41:52 PM
From: LindyBill4 Recommendations  Read Replies (1) of 793914
 
Humans Causing US Southwest Forest Burn Out
from FuturePundit by Randall Parker
Craig Allen of the US Geological Service thinks human-caused changes to the US southern Rockies forest ecosystem caused fire-burning patterns that are wiping out forests. But beginning in 1900, when railroads enabled the spread of livestock, cattle devoured the grassy surface fuels and the fire cycle stopped. A decade later, a national policy of forest fire suppression formalized this new normal. Over the next century, forest density went from 80 trees per acre to more than 1,000. 80 trees to 1000 trees per acre is a huge increase in biomass density. The problem: Now when fire comes the heat is so intense that fires no longer stay on the ground. They burn up into the trees and wipe them out.
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