The a committee of UK Members of Parliament have said that the government should go ahead with a system of personal "carbon credits" to meet emissions targets.
Under such a scheme people would be given an annual carbon limit for fuel and energy use - which they could exceed by buying credits from those who use less.
The Committee said the scheme would be more effective than taxes for cutting carbon emissions. The Committee chairman Tim Yeo said that "green" taxes, such as a petrol tax, cost poor people more because everyone - "billionaires and paupers" - paid the same amount.
Yeo said: "Under the personal carbon trading, someone who perhaps doesn't have an enormous house or swimming pool, someone who doesn't take several holidays in the Caribbean every year, will actually get a cash benefit if they keep a low carbon footprint."
Unfortunately the UK government are not funding any more research into personal carbon credits as Ministers said there were practical drawbacks to the proposal. For these drawbacks see the BBC article here.