Business Green: Transport for London (TfL) hopes to cut its carbon emissions by 40 per cent and save £90,000 per annum on utility bills with a newly unveiled green power plant at its head office that includes the UK’s largest hydrogen fuel cell. TfL and the London Development Agency (LDA), which is housed in the same building, also announced last week that they plan to sign up to the 10:10 energy efficiency campaign from this April. As a result, they have committed to reduce carbon emissions …