Campaigners troubled by WHO delay of tougher air pollution guidelines

By Adam Vaughan

The World Health Organization (WHO) has postponed the publication of new guidelines on tougher limits for air pollution, New Scientist has learned.

The recommendations are expected to be highly influential in how countries around the world act to clean up dirty air, a public health crisis that kills millions of people annually. Campaigners say the delay is troubling and risks pushing back strong action on air pollution.

The WHO’s current limits on air quality, first set in 2005, are considered …