NEW : Beijing recording `` hazardous '' levels of air pollution Sunday . NEW : Children in worst-hit areas ordered to stop outdoor sports activities . Reports of respiratory problems -- and sale of masks -- skyrocket . Beijing will remain covered in gray until Wednesday , when the wind will sweep in to the rescue and blow the smog away , according to state media . Air Quality Index in Atlanta records an index of nearly 30 micrograms Monday .
NEW : Beijing recording `` hazardous '' levels of air pollution Sunday . NEW : Children in worst-hit areas ordered to stop outdoor sports activities . Reports of respiratory problems -- and sale of masks -- skyrocket . Air Quality Index in Atlanta records an index of nearly 30 micrograms Monday .