Incommensurability, Environment and Planning: A Response to Hahnel's Reply

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This paper responds to Hahnel’s reply to my paper ‘Pluralism, ecology and planning’ in this special issue. It focuses on disagreements concerning value commensurability and growth. It defends the possibility of rational choices in the use of resources in the absence of value commensurability. It defends the claim that the systematic drive for growth in capitalism is a central source of environmental problems and of environmental injustice. It questions Hahnel’s assertion that substitution in production and consumption alone is the only strategy to achieve environmental sustainability. Substitution is necessary but not sufficient. Environmental limits require consumption and production corridors above sufficiency for all but below excess. Those corridors are a condition for meeting the needs of the poor within environmental limits. Both the examination of environmental problems in capitalism and democratic planning require forms of in-kind analysis defended by Neurath and Kapp to address the problem of meeting human needs within environmental limits.