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Doing no harm is not the same as doing nothing.
Yes, the climate is a complex "organism", made up of a myriad of microclimates. The environment under a shade tree is far different rhan the environment 50 yards away in full sun. What does well in one area will not do so well in the other. On a larger scale, if an area of the country such as the Southwest continues to suffer from decreased rainfall, then it might be time to rethink the expansion that has been occuring there, and plan for the future needs of the area. Better harvesting of water, storage rather than letting monsoon rains make their way to the Gulf of California, etc. Action can be taken to alleviate change, but in most cases, these actions will be local in nature.
BTW....can one prove there are no new species being evolved? How does on explain the continuing ability of microorganisms to adapt and morph into new strains? Nothing is static in the world, only some things are subtle and in higher organisms, many centuries may be required for a truly new species to come along. We, as humans, think in too brief a time scale.
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Bob S. former owner of a 1984 silver 944
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