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  • Winners of SPAN's photo contest on "Environment: What Do You Want to Save?"

  • Scientists and entrepreneurs are changing the way we grow our food, making agriculture ripe for another green revolution.

  • Q&A on the intersection of energy, economics, geopolitics and the environment.

  • Exploring some of the most ecofriendly public buildings in the United States.

  • Chicago-based Root3 Technologies provides small-scale energy operators with precise data on optimal amount of energy requirement.

  • A breakthrough water-repellent coating aims to drastically reduce carbon dioxide emissions in power plants.

  • SolePower makes shoe inserts that provide clean, renewable energy.

  • Jennifer Turner is the director of the China Environment Forum at the Woodrow Wilson Center. Her current research focuses on environmental activism in China and how water use and energy are inextricably linked.

  • Major tech companies are working to power the Internet with renewable energy.

  • The social robots created by Carnegie Mellon University researchers can gossip, get cranky and even talk back to students.

  • Augmented and virtual reality games may help crack the code of getting humans to do something about the environment.

  • Accurate weather forecasting improves data accessibility, economics and everyday life.

  • Energy expert Michael A. Levi discusses the impacts of climate change on energy security in the United States and South Asia.

  • Particles from one billionth to 100 billionths of a meter in size can be used to help diagnose an illness faster and more accurately.