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Posted Mon Jan 30 2012: from Wit:
Dead Trees, Dying Forests
Since the mid-20th century, scientific research has demonstrated conclusively that tropospheric ozone is toxic to vegetation, entering plants through stomates in foliage and needles as they absorb CO2 to photosynthesize. Naturally occurring stratospheric ozone is beneficial, it protects the earth's surface from too much solar radiation. By contrast ground-level ozone is formed through complex chemical reactions when volatile organic compounds react with precursors from burning fuel, reactive nitrogen from agriculture, and methane in the presence of UV radiation from the sun...and it's poisonous to all forms of life.... That trees are dying is empirically verifiable by a cursory inventory. The photos here and on the blog exhibit characteristic symptoms readily located in any woods, suburban yard, park or mall; and include stippled, singed foliage with marginal burn (on the edges) and chlorosis - a loss of normal pigmentation from reduced photosynthesis producing chlorophyll; yellowing coniferous needles; thinning, transparent crowns; cracking, splitting, corroded, oozing and stained bark; early leaf senescence; loss of autumn radiance; holes; cankers; absence of terminal growth; breaking branches; rampant lichen growth and ultimately, death.
[Read more stories about: forests, airborne pollutants, massive die-off]

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'Doc Michael says:
If a forest dies and nobody screams, does it make a sound?

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