Plants, and above all trees, reduce the dryness of the city climate. In streets, squares and parks they not only provide shade but also lower the ambient It as heat is taken up by the process of photosynthesis And transpiration.
Nevertheless, the lives of tens of millions of people have been saved by quinine, for example, extracted from the bark of the cinchona, a tree growing in the sub-tropics. Trees are also a source of various other raw materials, e.g. cork from the cork oak and the Amur cork tree, and cotton And stuffing material (kapok) from various species of Ceiba, the kapok and silk cotton trees.
In hill accustomed to see oaks, limes and maples beside farmhouses ncl churches, and in mountain pastures the occasional mountain ash, juniper and spruce. Beside mountain cottages one may see spreading sycamores, ashes, elms and beeches. Avenues alongside roads and highways not only help these to blend well with the landscape but also provide welcome shade to both man and beast.
Today, all these fruits are a good and welcome supplement to our daily fare, but in former times they played it vital role in man's diet. In sonic undeveloped tropical regions hey are the chief source of food to this day.
Today, we realize that, besides being a source of raw materials, trees are of even greater importance for their role in the regulation of climate, water management, hygiene, health, recreation; ttid, last but not least, in beautifying the environment. The past century has witnessed a rapid increase in world population, and the progress of science and technology has greatly changed man's way of life. The result has been the emergence of vast industrial and suburban areas, with the majority of people living in cities, which have a specific climate and air polluted with dust, gases and other noxious substances. Industrial centres lind cities are plagued by increasing noise that goes beyond bearable limits, the work pace is accelerating and man's tirrvous system is being exposed to ever greater stresses.
A covering of trees and shrubs also prevents the formation and widening of gullies arid ravines in danger spots on the earth's surface.
Nevertheless, the lives of tens of millions of people have been saved by quinine, for example, extracted from the bark of the cinchona, a tree growing in the sub-tropics. Trees are also a source of various other raw materials, e.g. cork from the cork oak and the Amur cork tree, and cotton And stuffing material (kapok) from various species of Ceiba, the kapok and silk cotton trees.
In hill accustomed to see oaks, limes and maples beside farmhouses ncl churches, and in mountain pastures the occasional mountain ash, juniper and spruce. Beside mountain cottages one may see spreading sycamores, ashes, elms and beeches. Avenues alongside roads and highways not only help these to blend well with the landscape but also provide welcome shade to both man and beast.
Today, all these fruits are a good and welcome supplement to our daily fare, but in former times they played it vital role in man's diet. In sonic undeveloped tropical regions hey are the chief source of food to this day.
Today, we realize that, besides being a source of raw materials, trees are of even greater importance for their role in the regulation of climate, water management, hygiene, health, recreation; ttid, last but not least, in beautifying the environment. The past century has witnessed a rapid increase in world population, and the progress of science and technology has greatly changed man's way of life. The result has been the emergence of vast industrial and suburban areas, with the majority of people living in cities, which have a specific climate and air polluted with dust, gases and other noxious substances. Industrial centres lind cities are plagued by increasing noise that goes beyond bearable limits, the work pace is accelerating and man's tirrvous system is being exposed to ever greater stresses.
A covering of trees and shrubs also prevents the formation and widening of gullies arid ravines in danger spots on the earth's surface.
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It is no good garden planning to use a material which is unavailable and in general, only materials available through a local garden centre or building contracter is suggested.
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