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Editor<br />
Swiss Agency for the Environment, Forests and<br />
Landscape (SAEFL)<br />
SAEFL is an agency of the Federal Department<br />
of Environment, Transport, Energy and Communications<br />
(DETEC)<br />
Authors<br />
Mario Keller & René Zbinden<br />
INFRAS<br />
Mühlemattstrasse 45<br />
CH-3007 Berne<br />
SAEFL consultants<br />
Felix Reutimann<br />
Air Pollution and NIR Division<br />
Transport Section<br />
Cover pictures<br />
© SAEFL/Docuphot and Informato AG<br />
Distributed by<br />
Swiss Agency for the Environment, Forests and Landscape<br />
Documentation<br />
CH–3003 Berne<br />
Fax + 41 (0)31 324 02 16<br />
E-mail: docu@buwal.admin.ch<br />
Internet: www.buwalshop.ch<br />
Order number and price<br />
SRU-355-E / CHF 20.– (incl. VAT)<br />
© SAEFL <strong>2004</strong>