Talk:Substitution principle (sustainability)

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Definition of principle
An earlier version of this article defined the principle as "substitution... that is more efficient or beneficial in some way while retaining the same functionality". This is arguably incorrect - assuming that electric cars, for example, are more sustainable but smaller and slower than petrol-powered cars, then the electric cars would normally be considered an important substitute, even though their functionality as a car is more limited. Paulwhaley (talk) 15:21, 19 November 2011 (UTC)