The Environmental Protection Agency on Thursday set stringent new standards for airborne lead particles, following the recommendations of its science advisers and cutting the maximum allowable concentrations to a tenth of the previous standard. It was the first change in federal lead standards in three decades.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/epa-toughens-standard-lead-emissions-change-first-3-decades
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/new-york-times-new-york
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/lead
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/emissions-trading
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/new-york