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Escape the bad air: Hong Kong scientist develops app that lets users plan routes to avoid pollution

  • People sensitive to pollutants, such as asthma patients, likely to find new app a boon
  • Users will be able to assess health risks from exposure to air pollution in different areas

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A new version of the PRAISE-HK app will allow users to plan their commute through routes with the cleanest air. Photo: HKUST
A Hong Kong scientist has developed a route-planning mobile app with a difference – it directs users through areas with the lowest levels of air pollution.

Dr Alexis Lau Kai-hon of the University of Science and Technology (HKUST) hopes it will help people most susceptible to the effects of bad air, such as asthma patients.

He said: “Most people seek the fastest or cheapest routes, or those with the least amount of walking, but our new app lets people ask another question – which route will lower my exposure to air pollution?

“This is worth asking because when you commute and move through different parts of the city, you breathe in different contaminants.”

Professor Christine Loh (left) and Dr Alexis Lau of HKUST. Photo: Xiaomei Chen
Professor Christine Loh (left) and Dr Alexis Lau of HKUST. Photo: Xiaomei Chen
Called PRAISE-HK, the app builds on an earlier version released three years ago, which tells users the amount of air pollution at street level wherever they are.
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