Taking cue from plants
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/green-car-turns-over-new-leaf
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/times-india-new-delhi
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/air-pollution
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/air-pollution-control
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/vehicular-pollution
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/scientific-and-technical-development
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/ministry-science-and-technology