Unilever has topped a new index that assesses how Britain's largest companies are dealing with climate change, outperforming other industry leaders such as Tesco and Centrica…Rolls-Royce…is No 4…behind BT Group in second place and…Morrisons in third…Although it failed to make the overall top 10, Imperial Tobacco tied for second with BSkyB for managing CO2 emissions in the supply chain, just behind publisher Reed Elsevier. Sixty of the FTSE 350 firms – including one FTSE 100 company, Aggreko – failed to make the index because they refuse to publish information on carbon emissions…The operator of the UK's largest coal-fired power station, Drax, came in last…Easyjet came second-last in this category…