01738ngm 22004453 450 991088849000332120200709043134.0(CKB)4340000000149088(OCoLC)867771769(EXLCZ)99434000000014908820160329d2010 k| vengur|n||||||||atdirdacontentvrdamediacrdamediavzrdacarriercrrdacarrierExtinction /Produced by Evan ClarkGeelong, Victoria :Switch International,2010.1 online resource (24 minutes)Extreme Environments ;22Title from resource description page (viewed March 29, 2016).Our planet's untouched natural environments are shrinking, due to pressure from human populations. As these areas decline, the creatures adapted to live in them face a decline in numbers, and sometimes even extinction altogether. Many biologists believe that if we don't act quickly, half the world's species will be gone in 100 years. A report called the Living Planet Index reveals that from 1970 to 2000, populations of terrestrial and marine species dropped by 30 percent, while freshwater populations went down by a massive fifty percent.BiologyEnvironmental ScienceAnimalsEnvironmentDocumentaryBiologyEnvironmental ScienceAnimalsEnvironmentClark EvanVaAlASPVaAlASPVIDEO9910888490003321Extinction4266179UNINA