Via: Los Angeles Times:
After nearly two decades in Beijing, David Wolf knew it was time for a change when his 11-year-old son, Aaron, somberly asked him, "Dad, when you were growing up, did you ever have PE outdoors?" Wolf had grown up in smog-choked Los Angeles in the 1970s, but even that wasn't nearly as bad as Beijing today. His son, like many young students in the city, has been kept inside for months, with the luckier children getting the chance to exercise under huge air-filtered domes that their international schools have built.
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