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In page Personal carbon trading:

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Personal carbon trading has been criticised for its possible complexity and high implementation costs. As yet, there is minimal reliable data on these issues. There is also the fear that personal "rationing" and trading of allowances will be politically unacceptable,[14] especially if those allowances are used to buy from industries who are already passing on costs from their participation in carbon levy or trading schemes such as the EU ETS.[citation needed]