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This slimy green sludge clogged nearly 7,700 square miles of China's Yellow Sea. What's the story?

Want to ace the bus or train? Follow these 10 Commandments of Transit. You'll be a pro (and will be thanking us later).

While California still faces extreme drought, here's hoping these images are the worst wildfire shots of the year.

1 year after Hurricane Sandy, it's incredible how much rebuilding still needs to be done. Click through for photo gallery.

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Citarum River in Indonesia, considered to be the most polluted river in the world

Please share this to help spread awareness about ocean acidification Alarming Before and After Photos of Ocean Acidification More photos here: