It wasn't that long ago, for example, that driving your car down the road meant sending harmful lead pollution and other contaminants into the air. (transportation.gov)
How green belt along the sides of roads help us to protect the environment from noise pollution and vehicle lead pollution. (studentsassignmenthelp.com)
In Greenland lead isotopes in ice cores reveal a record of lead pollution from Roman smelting in Spain some 2,000 years ago. (scientificamerican.com)