Chennai is the highest per capita emitter of greenhouse gases among seven major cities in the country. http://timesofindia.feedsportal.com/c/33039/f/533979/s/44aee2cd/sc/31/l/0Ltimesofindia0Bindiatimes0N0Ccity0Cchennai0CChennai0Eemits0Emost0Egreenhouse0Egases0Eper0Eperson0Carticleshow0C4665770A50Bcms/story01.htm