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To ask the Secretary of State for Business, Innovation and Skills what methodology is used in impact assessments across Government to assign a value to environmental (a) policies and (b) legislation to represent their potential benefit to the low-carbon and environmental goods and services sector.
The development of business cases and impact assessments across HM Government follows the guidance set out in The Green Book—Appraisal and Evaluation in Central Government (2011). This guidance is supported by a comprehensive set of more detailed supplementary guidance which covers a range of issues including methodologies for the calculation of environmental impacts. All guidance can be found on HM Treasury's web pages: