a and ranks as number 32 in the world among net exporters of crude oil and was producing 259,980 barrels of crude oil a day in 2009. Most electricity is produced from coal, but 25–28% of electricity demand is supplied through wind turbines. Denmark is a long time leader in wind energy, and as of May 2011 Denmark derives 3.1% of its gross domestic product from renewable (clean) energy technology and energy efficiency, or around €6.5 billion ($9.4 billion). Denmark is connected by electric transmission lines to other European countries.
Denmark's electricity sector has integrated fluctuating and unpredictable energy sources such as wind power into the national grid. Denmark now aims to focus on intelligent battery systems (V2G) and plug-in vehicles in the transport sector
