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Science 29 September 2000:
Vol. 289. no. 5488, pp. 2291 - 2293
DOI: 10.1126/science.289.5488.2291
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Perspectives

Also see the archival list of Science's Compass: Enhanced Perspectives

ATMOSPHERIC CHEMISTRY:
Enhanced: The NO2 Flux Conundrum

Manuel T. Lerdau, J. William Munger, Daniel J. Jacob

Nitrogen oxide radicals, NOx, play an important role in atmospheric processes from acid rain to tropospheric ozone formation. Several large sources and sinks for NOx are known, but as Lerdau et al. discuss in their Perspective, the role of vegetation as a sink or source of NOx remains controversial. This is an important problem because NOx emission processes must be understood to be able to predict future environmental impacts.

M. T. Lerdau is currently at the Institute of Ecosystem Studies, Millbrook, NY 12545, USA. Permanent address: Ecology and Evolution Department, State University of New York, Stony Brook, NY 11794, USA. E-mail: manuel.lerdau{at}sunysb.edu J. W. Munger and D. J. Jacob are in the Division of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA.

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