- Associated Press - Friday, March 7, 2014

CONCORD, N.H. (AP) - The New Hampshire Department of Environmental Services says air pollution concentrations in the southwest part of the state are expected to last through Saturday.

The department is advising sensitive individuals in this area to take precautions to protect their health by limiting prolonged exertion. Those people include children, older adults, and anyone with heart or lung disease such as asthma, emphysema, and bronchitis.

The unhealthy particle pollution levels are a combined result of pollution transported from surrounding areas; calm, cold air; and temperature inversions, which limit air movement. Temperature inversions happen during calm, cold nights when warm air above traps cold air below.

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