A new study has shown that decreasing carbon dioxide levels in the atmosphere led to a phenomenon of increased global cooling one million years ago.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/dip-co2-levels-1-million-years-ago-cooled-earth-led-glacier-growth-study
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/indian-express-new-delhi
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/climate-change
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/carbon-dioxide
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/glacial-melt
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/atmosphere
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/global-warming