Study confirms ozone air pollution can kill

Scientists in the US have found that even short-term exposure to ozone, a key component of smog, at levels currently found in many areas, is likely to kill some people prematurely.

The study, by the National Research Council, adds that the evidence is strong enough that the US Environmental Protection Agency should
include ozone-related mortality in health-benefit analyses related to future ozone standards.

Ozone can cause respiratory problems and other health effects. Deaths related to ozone exposure are more likely among people with
pre-existing diseases, the researchers said, but added that the premature deaths are not limited to people who are already within a
few days of dying.

Ozone is a form of oxygen formed by the reaction of sunlight on air containing other pollutants such as hydrocarbons and nitrogen oxide.

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