Business Green: Ed Miliband yesterday used his first speech since his appointment as energy and climate change secretary to urge the public sector to play a greater role in the generation of renewable energy. Echoing comments made the previous day by Environment Agency chairman Lord Smith, Miliband told delegates at the Agency’s conference that with the public sector owning 10 per cent of land in the UK, it should be capable of generating far more than the one per cent of the country’s renewable …