John
Gribbin, in New Scientist (Apr. 7, 1981),
New Science Publications, Common-

and South
wealth House, 1-19 New Oxford St., Lon- don WC1, United Kingdom.
For years, scientists have warned of the so-called greenhouse effect- asserting that extensive burning of fossil fuels will dangerously in- crease heat-trapping carbon dioxide in the atmosphere, causing the Earth's climate to warm. Now, some have added a new twist. Climatol- ogists at the University of East Anglia, in England, contend that...