Genetic aspects of air pollution and climate change
Summary :
Table of Contents
- Introduction.
- Genetic aspects of air pollution.
- Genetic aspects of climate change.
- Knowledge gaps and research needs.
- Reliance on wild trees in agroforestry.
- Agroforestry as a science and in development.
- Conclusion.
Abstract
The first incidences of air pollution impacts on the genetic constitution of forest tree populations were those documented near point sources of sulfur dioxide (SO2), particulates, and heavy metals. Localized extinction of forests around these point sources was documented by ecologists in the past two centuries. In North America, the most spectacular of these areas were those surrounding ore smelters in Trail, British Columbia, Sudbury, Ontario, and Copper Basin, Tennessee. In Europe, the most dramatic areas included the Black Triangle area (of eastern Germany, Poland, and the then Czechoslovakia) which was largely due to soft coal burning in power plants and numerous situations where industrial facilities were located in valleys such that toxic emissions destroyed vegetation on the surrounding hillsides. With these early pollution problems, large areas of forests have simply been replaced by grasses or other tolerant vegetation.
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