Scotsman: JOHN Lewis’s three Scottish stores are to have cutting edge biomass technology installed in an attempt to slash the chain’s carbon emissions by 2020. Edinburgh’s flagship shop at the St James Centre is likely to be one of the first to use the wood chip-fired combined cooling heat and power plant when it undergoes refurbishment as part of a major regeneration of the shopping mall in 2012. The branches in Aberdeen and Glasgow are also likely to be among the 14 department stores and 115 Waitrose…