The lower house of the Swiss parliament has accepted a proposal to introduce a tax on non-renewable energy sources as an amendment to a new constitutional energy law. The decision threw existing plans to implement a carbon dioxide tax into confusion. The amendment will introduce a tax of CHF 0.006/kWh on oil, gas, coal and uranium, reports ENDS Environment Daily. This would generate revenues of CHF 500 million a year. Half the money raised would go to promote solar energy; the rest to encouraging energy efficiency. The proposal is expected to move to the upper house of parliament in the autumn, where it must pass before implementation.