Petroleum refiners, meanwhile, got 2.25percentt of these allowances, although the transportation sector accounts for about 40percentt of emissions.
The availability of these allowances, used by governments all over the world, has nothing to do with tax avoidance.
In a letter to the European Banking Authority, which monitors the industry, Barnier said: "I would like to underline my strong concerns with regard to continuing reports of the use of these allowances.
The approved proposal will try to shore up prices for permits to emit greenhouse gases by delaying the auctioning of some of these allowances in the coming years through what is called backloading.
But the prices of these allowances, which are traded by manufacturers and financial institutions, have plummeted to about €5 a ton, compared with €7 a ton a year ago and around €25 per ton in 2008.
Many of these allowances are fiendishly complicated; they distort business decisions and raise the cost of tax compliance.The Treasury is also worried about another big distortion caused by the corporate tax system the incentive it gives to use debt rather than equity finance.
It is the expected price of these allowances in the futures and not their current price that drives behavior.
He said he would be happy for his accounts to be audited by an independent accountant "if that would solve the argument", adding: "UKIP don't want any of these allowances.
More important, they proposed to tighten the rules for allocating pollution allowances to make emitters pay the government for these allowances instead of getting them for free.
Of reassurance, these allowances were discontinued completely 1 year after conducting this survey, without substantial impact on meeting attendance, reporting or retention during the following 12 months.
