Business Green: Logistics giant Fedex has pledged to source almost a third of its transportation fuel, including that used by its fleet of aircraft, from second generation biofuels by 2030. Speaking at a US Chamber of Commerce Aviation Forum last week, the company’s chief executive Fred Smith launched the “30 by 30” initiative, which aims to use fuel created from non-food feedstocks such as jatropha and switchgrass. Smith, who has already pledged to cut a fifth of the company’s greenhouse gas …