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"The World Health Organization (WHO) maintains and analyzes cancer
mortality (death) data from 70 countries. WHO research shows
that industrialized countries have far more cancers than countries
with little industry (after adjusting for age and population
size). One-half of all the world's cancers occur among people
living in industrialized countries, even though such people are
only one-fifth of the world's population. From these data,
WHO has concluded that at least 80 percent of all cancer is
attributable to environmental influences."
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"My colleagues at Strang and I found that human breast cancer
cells had levels of the bad estrogen that were more than four
times higher than those of normal breast cells. When
organochlorine pesticides were added to breast cancer cells,
the ratio of the amounts of bad to good estrogen significantly
jumped. These pesticides, which tend to accumulate in fat
cells may somehow have influenced the formation of different
estrogen metabolites. These and other findings led us to
postulate that exposures to certain xenoestrogens in the
environment might account for some of the current rise in
breast cancer incidence by increasing the ratio of bad and
good estrogens in breast tissue. Several small studies
conducted in the 1970s and 1980s found that women with higher
levels of DDT metabolites in their blood had higher risks of
breast cancer."
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