Allen & Overy (A&O) has been named as the firm with the largest carbon footprint out of of a group of 18 UK firms that have chosen to publicly reveal their environmental impact.

Based on the Legal Sector Alliance’s (LSA) newly-developed tool, dubbed the LSA Protocol, which enables law firms to make an estimate of the level of carbon dioxide emissions it is responsible for, A&O was responsible for 27,269 tonnes of CO2 – or 8.52 tonnes per employee.