The hazard is in chronic exposure, even at low concentrations.

Chronic exposure to the sun can cause cataracts and skin cancer.

But the annual standard, which affects chronic exposure, remains at its original 1997 level.

"Which is consistent with acute rather than chronic exposure."

There is no thought being given to regulate chronic exposure to ozone over a period of a year or more, according to an agency spokesman.

Chronic exposure to stress hormones can damage the body.

Health problems associated with asbestos are caused by long-term, chronic exposure."

Chronic exposure may lead to weight loss, anemia, and possible liver damage.

Some electromagnetic fields at chronic exposures may pose a threat to human health.

With chronic exposure, though, people become accustomed to the stimulant effects of caffeine.

Chronic exposure may result in kidney and liver damage.

Of specific concern are chronic exposures to toxins including smoking, alcohol, and drugs.

Chronic exposure to low levels of carbon monoxide can lead to depression, confusion, and memory loss.

Chronic exposure to noise may cause noise-induced hearing loss.

It is unknown whether low-level chronic exposure may cause permanent neurological damage.

Chronic exposure may worsen cardiovascular symptoms in some people.

Single or chronic exposure can lead to berylliosis, an incurable lung condition.

However, chronic exposure has been linked to abnormalities in the liver, kidneys, and heart.

Chronic exposure to the gas can cause lesions similar to the early stages of lung damage from smoking.

Chronic exposure to lead or mercury can lead to permanent neurological damage.

Drinking water estimates for chronic exposures, based on models, from both ground and surface water are not of concern.

Chronic exposure to chloromethane has been linked to birth defects in mice.

Chronic exposure can cause losses in bone density, weight loss, and on a more serious note even anorexia.

Chronic exposure may cause cancer or reproductive damage.