Facebook founder/China enthusiast Mark Zuckerberg is in Beijing today, and in a huge "eff you" to the hazardous smog, he went on a run through Tiananmen Square without a facemask. He bragged about it on Facebook, natch.
Laughing in the face of pollution, "Suckuperberg" (h/t TechinAsia) made no mention of the air quality index (AQI), which, according to the US Embassy's Air Quality Monitor in Beijing, measured 337 at around the time the photo was posted. An AQI measuring above 300 is considered "hazardous."
Hardcore, Zuck. Hardcore.