EESA10H3 : textbook notes

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Improved water, food, and milk sanitation, reduced physical crowding, improved nutrition, and central heating with cleaner fuels were the developments most responsible for the great improvements in public health achieved during the twentieth century. For the first time, human beings are altering the basic operations of the earth"s atmosphere, geosphere, and biosphere. Between one-third and one-half of the land surface has been transformed by human action. Biologists have observed startling declines in frog populations around the world, even in isolated and relatively pristine environments. It appears that no single factor is responsible. The declining health of frogs, birds, and thousands of other organisms may be the clearest indication of environ- mental threats to human health. Oday"s environmental degradation is rapidly creating an unprecedented global crisis. The driving forces are population growth and industrialization. 9. The rate of industrialization, which has far outpaced the growth in population, is a powerful determinant of environmental transformation.

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