Ecology efforts

Included in some materials on ecology I've been reviewing are Commoner's four laws of ecology. Professor Barry Commoner first stated these in his 1971 book The Closing Circle. They are a great legacy. We still have a lot to learn with respect to them. Sadly we have yet to make them part the core of our decision making in practical terms, though they continue to have a great impact. Here's a screencast summarising Commoner's four laws of ecology, along with a few additional comments on the science and its implications.
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