THE CHALLENGE OF WORLD HUNGER

In the ``Environmental Issues'' series, this overview of the science, technology, and politics of hunger suffers from an excess of definitions and from muddy thinking. Spencer defines ``biotechnology,'' for example, as ``Changing plant and animal genetic structure by scientific methods,'' stating that the basic principles have been known for thousands of years: ``Noah used them to make wine from grapes to celebrate the landing of the ark on dry ground.'' How does fermentation alter the genetic structure of grapes? The author indicates that ``governments must either find ways to slow down population growth or to increase the food supply. They cannot do both'' (why not?), but gives little information on either and concludes that ``the U.N., since its membership includes all nations, large and small, rich and poor, can deal on a global basis with global problems.'' He celebrates the 1990 U.N. conference that encouraged people to ``light a candle for the future of children everywhere.'' Candles are no more nourishing than platitudes. Glossary; further reading; organizations for further information; index. Photos not seen. (Nonfiction. 10-12)*justify no*