“I'm very aware that this programme may be regarded as bleak or depressing - an increasing population with an ever decreasing supply of resources – but humans have capabilities that animals don't: to think rationally; to study; to plan ahead. The number of people on the planet depends on the personal decisions we each make regarding the number of children we have even setting aside the moral responsibility we have to protect other species, if we continue to damage our ecosystem, we damage ourselves. Its clear that we'll have to change the way that we live and use our resources. We're at a crossroads where we can chose to cooperate or carry on regardless. Can our intelligence save us? I hope so. m46s24-m47s15”
How Many People Can Live on Planet Earth? (BBC Horizon, 2009)
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David Attenborough 70
British broadcaster and naturalist 1926Related quotes

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“We have intelligent species on our planet that we are not even trying to communicate with.”
Worldfest video http://www.youtube.com/watch?v=PnhqmF-RBu4

"The Energy Crisis — Why Our World Will Never Again Be the Same", in Redbook (1974); later in Progress As If Survival Mattered : A Handbook For A Conserver Society (1977) by Hugh Nash, p. 166
1970s

Frans de Waal, in a NOVA interview, " The Bonobo in All of Us" PBS (1 January 2007) http://www.pbs.org/wgbh/nova/nature/bonobo-all-us.html; quotes from this interview were for some time misplaced on this page, which probably generated similar misattributions elsewhere, and the misplacement was not discovered until after this quotation had been selected for Quote of the Day, as a quote of Goodall. Corrections were subsequently made here, during the day the quote was posted as QOTD.
Misattributed
Context: I think if we study the primates, we notice that a lot of these things that we value in ourselves, such as human morality, have a connection with primate behavior. This completely changes the perspective, if you start thinking that actually we tap into our biological resources to become moral beings. That gives a completely different view of ourselves than this nasty selfish-gene type view that has been promoted for the last 25 years.

Quoted in "Fritz Todt: Baumeister des Dritten Reiches" (München: F.A. Herbig, 1986), by Franz W. Seidler, p. 113.

How Many People Can Live on Planet Earth? (BBC Horizon, 2009)