L-R: Typical forest full of natural resources (Tangabati, Chittagong). Tribal people collect natural water without any contamination just at the base of hills; w(Mirersharai, Chittagong).
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/conserving-natural-resources-biological-importance
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/daily-star
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/ecology
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/forests
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/wetlands
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/agriculture
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/aquaculture
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/mammals
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/bangladesh