There’s nothing better than an early-morning run to scrape the cobwebs off and inject a bit of energy into your day. Although it might seem counter-intuitive, running is a great remedy for fighting jet lag and forcibly adjusting yourself to a new schedule. The cool, crisp, dewy air filling your lungs and the oxygen-filled blood pumping throughout your body provide a fast track to rejuvenation. And what better place is there on this Earth to take that refreshing dawn jog than the hazy, notoriously smog-choked streets of Beijing? Cue Mark Zuckerberg, co-founder and CEO of Facebook, who took a jaunt Friday morning in the Chinese capital with no mask, when pollutants in the air were at hazardous levels.