filling the air with noxious fumes affects not just beijing, it's moving elsewhere. >> that's right. >> derek van dam is here. >> it's about humans' interaction with the climate system, going back to climate change. global warming. all of these things have effects with the world weather patterns, including what is happening in northeast china particularly. we've been discussing the thick layer of smog that has blanketed beijing lately. well, natalie, some computer models shows that noxious gas moving across the sea of japan and potentially impacting the mainland of japan. let me highlight something for you. this is a satellite image from nasa. that gray murky color there is actually the smog starting to creep back into the southern suburbs of beijing. that is cloud cover there in the white. but if we overlay the wind profile, you can see these little streamlines that are bringing the smog or the potential of bringing the smog toward mainland japan.