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  2. Carbon credit - Wikipedia

    A carbon credit is a generic term for any tradable ... Countries manage this ... Thus the main advantages of a tradeable carbon credit over a carbon tax are argued to ...

  3. Rationing - Wikipedia

    Rationing is the controlled distribution of scarce resources, goods, services, or an artificial restriction of demand. Rationing controls the size of the ration, which is one's allowed portion of the resources being distributed on a particular day or at a particular time.