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Science 19 July 1996:
Vol. 273. no. 5273, pp. 293 - 297
DOI: 10.1126/science.273.5273.293
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Letters

Ah, wilderness!

Are changes in the chemistry of stream water and forest soil a result of "the natural processes of soil acidification" or of the "anthropogenic emissions" in acid rain? (At right, rainwater sampling at the Hubbard Brook Experimental Forest, New Hampshire.) Elsewhere, the herbivorous appetite of certain soft corals is measured. How robust is the evidence that human activity is accelerating the rate of species extinctions worldwide? And the difference between ion transport in membrane channels and the diffusion of molecules through zeolites is explicated.


How to Submit a Letter to the Editor

Volume 273, Number 5273, Issue of 19 July 1996 pp. 293-297.
©1996 by The American Association for the Advancement of Science.

Letters in This Issue

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[Letters] Acid Rain Revisited?
Charles R. Frink
James W. Kirchner
Gene E. Likens, Charles T. Driscoll, Donald C. Buso
[Letter] Herbivory in Soft Corals: Correction
Katharina Fabricius, Yehuda Benayahu, Gitai Yahel, Amatzia Genin
[Letter] Diffusion to a Different Drummer
Mark F. Schumaker
[Letters] Extinction Rates
Julian L. Simon
Stuart L. Pimm, John L. Gittleman, Gareth J. Russell, Thomas M. Brooks
[Corrections] Corrections and Clarifications

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Science. ISSN 0036-8075 (print), 1095-9203 (online)