1. Jeremy Rivers said that garbage left behind around Mt. Everest by past climbers now poses a serious threat to the environment and a hazrd to other climbers. ("A Mount Everest Makeover",p.4 )
2.Major environmental problems caused by tourism include the depletion of natural resources, pollution, and various physical damages caused by construction and tourist activities. ("Environmental Impacts of Tourism", p. 5-6)
3.John Convertino's 'How We See Animals, How We See Ourselves' quotes UCLA biologist Pat Farber's saying, "It is a failure of imagination that we humans cannot see value in animals beyond their use to us as food or entertainment."(p.27)
4.Every year, an estimated 25 million vertebrate animals are used for the purpose of research, experiment and education in the U.S. ("Frequently Asked Questions about Animals in Research". Dec 8, 2006)
5.Roberta Schultz reports in his 'An Endangerd Planet' that, "According to a United Nations report, approximately 25% of the mammals and 12% of the birds in the world might become extinct during the next few decades due to global warming."
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