Document b8o1JG6NbzDG9gDaoNrY9JEo
S. F. Chronicle
Feb. 24 1969
By David Perlman
Science Correspondent
The peregrine falcon, a ! highly poisonous, and chemi-
b i r d of prey that once | cals closely related to it are
abounded all over Ameri j known cancer-causers,
ca, is bearing a bitter j In California the pollutant
warning to man:
| is widespread; in the San
A newly-identified chemi Francisco Bay Area, where
cal pollutant has arisen on many industries use many
our planet: it threatens not varieties of the compound,
only the existence of falcons the chemicals have concen
and countless other birds, but trated heavily.
its molecules are already en tering the bodies of humans.
The new pollution threat is a class of organic chemicals
Its long-term hazards at called polychlorinated bi
low levels to the human spe phenyls. Few laymen have
cies are wholly unknown -- ever heard of them, yet they
although in concentrated gas
eous form the chemical is
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DSW 201193
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