91.   The incidence of childhood cancer has been creeping up for years, and while nobody knows the reason, many researchers suspect it may be linked to environmental factors.

92.   The most frequent causes of running injury are footwear problems, training errors, environmental factors, or anatomical abnormalities.

93.   The object of this benevolent whale hunt is to identify environmental factors contributing to the near extinction of North Atlantic right whales.

94.   The national fatness index is likely linked to such old-fashioned environmental factors as easy availability of junk foods and excessive sitting before televisions and work stations.

95.   The price would vary largely due to environmental factors, since some of the proposed sites have significant wetlands and potential traffic problems that would have to be addressed.

96.   The researchers concluded that environmental factors play major roles and genes relatively minor roles.

97.   The same disorder is caused by different mixes of genes, and by environmental factors.

98.   The scientific community is all but unanimous in discounting the notion that cancer clusters can be traced to environmental factors.

99.   The ruling requires Britain to provide details of how it will monitor safety and environmental factors and to take additional precautions against polluting the Irish Sea.

100.   The study heightened concern that unknown environmental factors in the Bay Area may be making women sick.