Precautionary Principle -Mental Model 091

Why San Francisco Measures The Potential Impact Of Its $600m Annual Spending

If an action or policy may cause harm to the public or the environment, in the absence of scientific consensus, the burden of proof that it is not harmful falls on those taking action.


Example: On the 18th of July, 2015, the City of San Francisco passed a Precautionary Principle Purchasing ordinance. It requires the city to weigh the environmental and health costs of its $600 million in annual purchases—from everything from cleaning supplies to computers.


Wisdom: “Precaution is better than cure.” — Johann Wolfgang von Goethe


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