Greenpeace activists project the message "Blue Sky Now!" onto a facade of the Drum Tower, an iconic historical building in Central Beijing. The PM2.5 (fine particles) concentration levels in Beijing have stayed above 250µg/m3 for more than 40 hours. The World Health Organisation's guideline for any 24-hour period of PM2.5 concentration is 25µg/m3.

Greenpeace East Asia calls on the Chinese government to accelerate its efforts against air pollution, and reminds affected residents to use proper protection.