New Scientist: HERE are some depressing facts: there is no global agreement to stop climate change; many countries don't have a serious policy to reduce greenhouse gas emissions; fossil fuels still receive more subsidy than clean energy. And yet despite this, renewable energy is catching on. It will overtake gas as a source of electricity within three years. By 2018, a quarter of the world's electricity will come from sources like hydropower and wind. Other technologies like solar panels are also going global...