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Air purifiers are shown at an international ecological technology and equipment expo inBeijing. GFK, a service provider of market research and consultancy, said that about 1.7 million air purifiers were sold in China in 2013, a 116 percent year-on-year increase. [Photo by Wu Changqing / ForChina Daily
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2. Buy him an air purifier
Nobody minds cleaner air, and an air purifier would please any health conscious person when the AQI (Air Quality Index) reads high. If your father already has an air purifier, add more green plants in his house or apartment to generate fresher air.
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