One of the principal factors in global warming, carbon dioxide, has been known for long to be produced in conjunction with various human activities. But a recent Japanese study has found that the
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/vehicles-also-contribute-global-warming
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/hindu-new-delhi
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/climate-change