(EnergyAsia, November 14, Friday) — China’s Yingli Green Energy Holding Company Limited, a world leading vertically integrated photovoltaic (PV) product manufacturer, said it has signed a new long-term agreement to buy polysilicon from Germany’s Wacker Chemie AG. Wacker Chemie will supply Yingli Green Energy with polysilicon from 2010 through the end of 2017. The total…