MICRO WIND FARM - We look at a miniature urban wind farm, built on the top of a 13-story building. WIND POWER SPAIN - Spain is looking to increase its expansion of renewable energy sources. ARGENTINA WIND FARM - How we can use wind as a source of energy. WIND FARMS IN THE UK - We take a look at the largest wind farm in Europe that opened in Scotland. BIO-GAS FEATURE - PART 1 - We look at turning liquid manure into methane gas. BIO-GAS FEATURE - PART 2 - Bringing together environmentally-friendly waste management and energy production. ENERGY FROM CHOCOLATE WASTE - We look at converting bacteria into hydrogen, then electricity.