• Authorities found that almost half of the staple grain in one of the country's largest cities was contaminated with a toxic metal.

    LAST UPDATE : May 21, 2013, 2:24 PM EDT
  • A flock of Geese fly past the smokestacks at the Jeffrey Energy Center coal power plant as the suns sets near Emmett, Kansas on December 2, 2012.

    Carbon dioxide was measured at 400 parts per million at the oldest monitoring station in Hawaii.

    LAST UPDATE : May 10, 2013, 5:09 PM EDT