Along with daily averages over the course of a year, the agency is also required to set one-day limits. The EPA is proposing to retain its one-day limit of 35 micrograms per cubic meter.

A severe sandstorm has cloaked Beijing and China’s northeastern regions for the fourth time in a month forcing some residents to stay indoors to protect themselves from dense air pollution.

SHANGHAI, April 23 (Reuters) - China should raise air quality standards as persistent smog continues to have a severe public health impact despite recent improvements, a state-funded task force said.

This article was originally published with the title “ Down among the Micrograms ” in Scientific American Magazine Vol. 283 No. 4 (October 2000) doi: ...

New research from South Korea has shown that even a 10 μg/m3 increase in atmospheric particulate matter can considerably reduce solar power generation and impact revenue of PV system owners.

The city had an annual average concentration of 128.2 micrograms per cubic meter of air. India was home to six of the nine most polluted global cities, IQAir said.

Blood lead levels have sharply declined among U.S. children ages 1 to 5, from nearly 90 percent having blood lead levels above 10 micrograms per deciliter in 1976 to 8 percent in 2010 according to ...

Vitamin D. Adults 51 to 70 years old need 15 micrograms each day. If you’re older than 70, you need 20 micrograms per day. Don’t get more than 100 micrograms a day, though. Vitamin D helps ...

BEIJING, Jan 4 (Reuters) - The Chinese capital Beijing met state air quality standards for the first time last year, officials said on Tuesday, a milestone lauded by experts, who also warned that ...