Turning crop waste and discarded paper into a material called biochar could help to capture carbon from the atmosphere and store it in the soil while also helping to enrich farmland.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/recharging-soils-carbon-could-make-farms-more-productive
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/phys
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/agriculture
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/soil-resources
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/carbon-sinks
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/nutrition
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/green-house-gases
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/carbon-offset