Greenpeace East Asia activists unfold a banner reading in Portuguese and Chinese "hazardous smog, wear mask" at the Bird's Nest stadium in Beijing, where the Superclasico football match took place.
PM2.5 (fine particles) concentration levels in Beijing have stayed above 250µg/m3 for more than 60 hours. The World Health Organization's guideline for 24-hour PM2.5 concentration is 25µg/m3.
Greenpeace East Asia reminds affected superstars from Argentina and Brazil, especially Messi and Neymar to use proper air pollution protection.