Kalibongan

An kalibongan (alternatibo nga kasurat: kalibungan), ha haluag nga pagpasabot, amo an kapareho ha natural nga kalibutan, pisikal nga kalibutan, o materyal nga kalibutan. An kalibongan in natudlok ha panhitabo han pisikal nga kalibutan, ngan ha kinabuhi. Lakip ini an bisan ano kadako nga butang tikang ha subatomica ngadto ha sangkalibutan.

Pinanbasaran

Mga sumpay ha gawas

 The IUCN Red List of Threatened Species (iucnredlist.org)
 The Wild Foundation – The heart of the global wilderness conservation movement (wild.org)*
 Fauna & Flora International is taking decisive action to help save the world’s wild species and spaces (fauna-flora.org)
 European Wildlife is a Pan-European non-profit organization dedicated to nature preservation and environmental protection (eurowildlife.org)
 Nature Journal (nature.com)
 The National Geographic Society (nationalgeographic.com)
 Record of life on Earth (arkive.org) 
 BBC – Science and Nature (bbc.co.uk)
 PBS – Science and Nature (pbs.org)
 Science Daily (sciencedaily.com)
 European Commission – Nature and Biodiversity (ec.europa.eu)
 Natural History Museum (.nhm.ac.uk)
 Encyclopedia of Life (eol.org).
 Science.gov – Environment & Environmental Quality .