He lays more stress on environmental issues than does either of the other parties.

ECONOMIST: The Liberal Democrats

Stress - not only the environmental type associated with earthquakes, but also marital or job stress - was likely to affect the placental clock and shorten gestation, she said.

BBC: Earthquakes 'trigger early births'

The crucial environmental factor, they believe, is childhood stress particularly how securely someone was attached to his mother when a child.

ECONOMIST: Evolution and politics

We stress our concern about the potential environmental impacts of ocean fertilization.

UNESCO: MEDIA SERVICES

Longevity genes appear to slow down the aging process by making cells and tissues more stress-resistant, better able to withstand the inevitable environmental insults that accumulate over a lifetime from bad diet, inflammation, radiation, genetic mutations and toxic chemical by-products called free radicals.

FORBES: Researchers are unlocking the mysteries of aging.

Evidence of oxidative stress can appear under other conditions, including exposure to certain environmental pollutants or infections in the urinary genital tract.

CNN: Cell phones can affect sperm quality, researcher says