Merely by conservation of nature, and reforestation, about 37 percent of global greenhouse gas emission could be reduced by 2030.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/india-can-reduce-520-million-tonnes-greenhouse-gas-study
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/zee-news
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/climate-change
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/green-house-gases
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/unfccc
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/india
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/carbon-dioxide