// definition
Carbon credit
A project-based emissions reduction or removal unit
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Short definition
A unit generally representing one tonne of CO₂ equivalent reduced or removed by a project under a specified programme and methodology. Its quality depends on additionality, the baseline, storage durability and prevention of double counting. Retirement prevents reuse of the unit; it does not reduce the life-cycle inventory of the product to which a buyer links it.
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Knowledge map
Intuition
The registry records a unit; the project and its methodology determine the climate benefit.