Contents of Volume 1,
by Carl Haub
An unprecedented 5.8 billion people now live on the Earth, and in
about 10 more years there will be 6.8 billion, with almost all the
growth in the less developed countries. The U.S. is the most populous
and rapidly growing of the more developed nations, in part through
immigration; each year it adds about 2.5 million people--the
equivalent of another San Diego.
by Frank R. de Gruijl
The growth of ozone-depleting substances in the stratosphere has
now been slowed, but increasing ozone losses are predicted through
the end of the present decade, with a gradual recovery in the 21st
century. Throughout this time health hazards will persist, although
what is known of these and other deleterious effects of enhanced
ultraviolet radiation is far from complete.
by Cynthia Rosenzweig and Daniel Hillel
Computer models that include the direct effects of enhanced CO2 on
plant growth predict that global greenhouse warming will generally
benefit agriculture in the U.S., Canada and Australia, while
diminishing agricultural productivity in the lower latitude,
developing countries that can least afford it.
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