The broadcaster and naturalist Sir David Attenborough says scientists and environmentalists have been cautious of overstating the dangers of global warming, but recent evidence of melting polar caps shows the situation is worse than had been thought. He also discusses population growth and disappearing habitats.....see following Guardian link:
http://www.guardian.co.uk/environment/video/2012/oct/25/david-attenborough-climate-change-video
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