the Swiss Parliament has become the first legislative body of the world to regulate the number of particulate matter
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/number-one-rule
[2] http://admin.indiaenvironmentportal.org.in/category/author/chirag-shah
[3] http://admin.indiaenvironmentportal.org.in/category/newspaper/down-earth
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/vehicular-pollution
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/spm
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/diesel
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/research
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/legislation
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/switzerland