Beijing pollution report notes annual improvements
Concentrations of four major air pollutants in Beijing continued to decline over the last year, while further efforts are needed to reduce the level of unhealthy particulates known as PM 2.5, an annual report released by the Beijing municipal protection bureau said.
efforts to control air pollution have resulted in some improvements. About half of the days in 2015 met national air standards, 14 days more than in 2014, the report said.
Among the four major pollutants, sulfur dioxide registered the largest decline, decreasing by 38 percent from the previous year.