Richard Turco helped to originate the theory of nuclear winter with Carl
Sagan. Earth Under Siege is the day-job, his lecture course on air pollution at
the University of California at Los Angeles. Encyclopedic in its coverage of
everything from urban smogs to Gaia and tobacco smoke to ice albedo, it is also
written with enviable clarity and verve. Published by Oxford University Press,
£15.95, ISBN 0 19 507287 1.
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