Talk:Substitution principle (sustainability)

This article has been automatically assessed as Stub-Class because it uses a sub-category of [[Category:Environment]] on the article page.

• If you agree with this assessment, please remove this message.
• If you disagree with this assessment, please:

1. Change the above "class=stub" to "class=start" or another applicable class per Wikipedia:WikiProject Environment/Assessment#Quality scale;
2. Remove the stub template from the article.

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)