81.   Some environmental factors may contribute to the problem, Aragon said.

82.   Still others are induced by environmental factors such as smoke or sunshine.

83.   Such heady pronouncements caused the proponents of environmental factors to bristle.

84.   Still others blame genetics, early childhood vaccinations and environmental factors.

85.   That kind of pattern, as opposed to a trait simply being present or absent, means that many genes and environmental factors must be involved.

86.   The agreement puts the decision in the hands of local governments, and allows them to block new stores on the basis of environmental factors including traffic and noise.

87.   The attraction seems to depend on environmental factors, versatility and esthetics.

88.   The correlation is far from perfect, though, and not all that much greater than for fraternal twins, which suggests that environmental factors also matter.

89.   The evidence is mixed, however, and nobody claimed the latest findings will settle the debate over how sexual orientation is shaped by biology versus environmental factors.

90.   The findings, however, are of limited value since everyone agrees that many genes, as well as environmental factors, are involved in the onset of ADHD.