Governance & Policy
Phase-Down
A scheduled, gradual reduction in the production or use of a substance or activity — distinct from an outright phase-out — used in treaties and national policy.
Definition
Phase-down is a policy and treaty mechanism requiring a progressive, scheduled reduction in the production, consumption or use of a regulated substance or activity over time, typically with percentage steps against a baseline year. A phase-down reduces rather than eliminates, whereas a phase-out sets an end date for complete cessation; both are usually codified in binding schedules with differentiated timelines for developing countries.
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