Trees are dying at more than twice the rate they were just a few decades ago, and rising temperatures is most likely to blame, according to a new report published in Science by scientists with the U.S. Geologic Survey. The death rate is not limited to a single species or region, but was described as "pervasive" across all forest types, all elevations, in trees of all sizes. Pines, firs, hemlocks and other kinds of trees all showed the same "worrying" decline.

The end result could be "substantial changes in Western forests," according to the report's lead co-author, Phil van Mantgem: more wildfires, fewer wildlife species, and forests {converted to} sources {rather than sinks} of the atmospheric carbon that causes global warming.

In other words, the very problem causing these trees to die will be enhanced by the fact of their dying. That is what scientists cause a positive feedback loop, and it's one of the most terrifying aspects of global warming. Force too many of these feedback loops, and you get a runaway global warming scenario that no carbon taxes or energy efficiency improvements will counteract.

http://www.thedailygreen.com/environmental-news/latest/global-warming-trees-47012207

Trees love CO2. Blame it on global warming. Are they growing at twice the rate? Maybe that is why they are dying at twice the rate.

Weakens trees and allows disease.
Same way human body filters poisons and becomes weakened.
Pollution is the dirty word unmentioned,
Eugenics at work

Whenever we have a long drought you can see the brown-leafed trees that die off. I lost three or four oak trees in the last couple of years that made it a hundred years.

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Part 2

You had an entry in this forum that spoke of the inefficiency of heat pumps in colder weather. There is a new technology coming that addresses the problem of working with colder air. The company is Hallowell International in Maine and their line of cold weather heat pumps is called Acadia- http://forums.cnet.com/5208-6130_102-0.html?forumID=50&threadID=301971&messageID=2816490