Original sentence: In 2004 the UK Royal Academy of Engineering reported on electricity generation costs for a new plant in the UK.Moreover the market externalities such as the impact on human health and the environment may be difficult to ascertain to an undisputed degree of certainty.The challenge in comparing costs for power is that electricity is not a fungible commodity as current losses cannot easily be replaced by similar quantities at a later time.These adjustments occur variously as carbon taxes, or renewable tax credits, direct or indirect subsides, production credits, and quotas, and are used by supporters and opponents of particular policies to move the market in their favour.To address these nuances both the EU and the U.While the market price for a commodity represents the cost at the point of purchase, it does not accurately reflect the total cost on society which is a matter of some speculation and much debate.have adopted market manipulations in an attempt to reflect these unaccounted costs
Edited sentence: A UK Royal Academy of Engineering report in 2004 looked at electricity generation costs from new plant in the UK