Complex sentence: Biofuels provide a large share of energy sources in Denmark when considering all sectors of energy demand, combining with Denmark's highly developed renewable energy resources in other areas to meet the country's ambitious renewable energy targets.
Split into simpler sentences: Biofuels provide a large share of energy sources in Denmark when considering all sectors of energy demand. In conjunction with Denmark's highly developed renewable energy resources in other areas, biofuels are helping Denmark meet its ambitious renewable energy targets.