Man As a Geological Agent An Account of His Action On Inanimate Nature
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Hence the nett result on the atmosphere of animal and vegetable activities at the present time appears to be approximately nil. E. H. Cook calculated that the action of green plants in decomposing carbon dioxide 304 MAN AS A GEOLOGICAL AGENT is sufficient to remove all additions of the gas to the air, but he appears to have overlooked the fact that dead land organisms decompose and return their con- stituents to the air and soil.
Besides the enormous additions of carbon dioxide to the atmospher...e made by the combustion of burning coal, lignite, and peat, there are additional sources of increase due to Man. In clearing the land for cultiva- tion, enormous areas of forest are turned into arable or pastoral land. This must considerably diminish the total quantity of green-leaf surface, for it seems obvious that in a forest, where the land bears not only the trees with their bushes of leaves, but also the undergrowth, as well as the mosses and lichens attached to the stems, there will be more green-leaf surface per acre than in a field of grass or crops, especially when a part of the ground is always fallow.
What to read after Man As a Geological Agent An Account of His Action On Inanimate Nature?
You can find similar books in the "Read Also" column, or choose other free books by Robert Lionel Sherlock to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
Hence the nett result on the atmosphere of animal and vegetable activities at the present time appears to be approximately nil. E. H. Cook calculated that the action of green plants in decomposing carbon dioxide 304 MAN AS A GEOLOGICAL AGENT is sufficient to remove all additions of the gas to the air, but he appears to have overlooked the fact that dead land organisms decompose and return their con- stituents to the air and soil.
Besides the enormous additions of carbon dioxide to the atmospher...e made by the combustion of burning coal, lignite, and peat, there are additional sources of increase due to Man. In clearing the land for cultiva- tion, enormous areas of forest are turned into arable or pastoral land. This must considerably diminish the total quantity of green-leaf surface, for it seems obvious that in a forest, where the land bears not only the trees with their bushes of leaves, but also the undergrowth, as well as the mosses and lichens attached to the stems, there will be more green-leaf surface per acre than in a field of grass or crops, especially when a part of the ground is always fallow.
What to read after Man As a Geological Agent An Account of His Action On Inanimate Nature?
You can find similar books in the "Read Also" column, or choose other free books by Robert Lionel Sherlock to read onlineMoreLess
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