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2. A beginner’s guide to carbon Footprinting;Williams;Carbon Management,2012
3. ‘Carbon footprinting’: towards a universally accepted definition
4. Available: Greener NHS delivering a net zero national health service Englandnhsuk
5. Greenhouse gas reporting: conversion factors. 2022 Available: at: https://www.gov.uk/government/publications/greenhouse-gas-reporting-conversion-factors-2022 Greenhouse gas reporting: conversion factors 2022 - GOV.UK (www.gov.uk)