LOS ANGELES (CBS) — As part of the “Build Smart Breathe Easier” asthma education campaign, an international pharmaceutical company is building four homes with asthma-healthy features for low-income families affected by the disease.

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Merck Pharmaceuticals has partnered with Habitat for Humanity, the Asthma and Allergy Foundation of America (AAFA) and carpenter and HGTV personality Carter Oosterhouse for the construction.

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Homes will be built for families in Atlanta, Detroit, Los Angeles and Philadelphia.

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Go to “Build Smart Breathe Easier” for ways to reduce exposure to asthma triggers in the home and to learn treatments for symptoms.