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(2016 BNL visit with Grand Challenges class students)

(2015 Graduation)

(ERG faculty, Master's and PhD graduates 2015; Source: Zoe Anna)

(Google Clean Energy Visit with ERGies, Mountain View, 2010)

(UNFCCC CoP15, Copenhagen, 2009)

(Stanford University with PESD colleagues, Stanford, 2009)

(Columbia University with C&S friends, New York City, 2008; Credit: Arezou Paksima)

(Tallberg Forum, Sweden, 2007; Credit: JIA Feng)

(Yosemite National Park, 2007)

(Graduation from PKU with friends, Beijing, 2006)

(UNFCCC CoP11, Montreal, 2005)