Others posted pictures wearing face masks of various shapes and designs . FlorCruz : On bad days in Beijing , seeing , breathing is difficult . Comment: State-run media acknowledge China 's lead status as emitter of greenhouse gases . Health is the big casualty .
FlorCruz : On bad days in Beijing , seeing , breathing is difficult . Comment: State-run media acknowledge China 's lead status as emitter of greenhouse gases . Health is the big casualty .