Based On Science

• Do wildfires pose serious risks to human health?

  Fires pose serious health risks even when they are not deadly. People in fire zones can suffer burns, breathing problems due to smoke inhalation, injuries, and other trauma from evacuations.

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• Are contrails harmful to the environment?

  Some contrails can contribute to global warming. Contrails—pure ice clouds (“cirrus”) that form from aircraft exhaust under specific cold conditions—can trap heat in the atmosphere, sometimes creating as much warming as the carbon dioxide released by burning jet fuel.

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• Can vitamin A help prevent measles?

  Vitamin A does not prevent measles. The most effective way to prevent measles is through vaccination. Vitamin A supplements are a tool in reducing complications from measles, but they will not prevent infection. Vitamin A, when used under the guidance of a health care provider, may reduce the severity of measles, particularly among children at high risk of deficiency. However, too much vitamin A is dangerous.

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