
Clean air treaty takes force on 2 continents
An agreement to limit black carbon emissions that accelerate melting of glaciers and sea ice entered into force in Europe and North America.
An agreement to limit black carbon emissions that accelerate melting of glaciers and sea ice entered into force in Europe and North America.
Tobacco's stigma has a new rival — air pollution — as the World Health Organization called attention to 7 million deaths a year from simply breathing.