Toxic algae has killed hundreds of thousands of animals, fish and birds. Most of the locals blame the fishing industry, saying the algae is caused by the huge amounts of waste that are thrown into the sea. Thousands of fishermen now face bankruptcy.
Mumbai's beaches are covered in trash. While most people just complain, one man has set out to change that - and kicked off the largest beach clean-up project in the world.
A plague of algae is washing up on beaches in Brittany. Experts say only a drastic cut in nitrate fertilizer use will get rid of it, but farmers are reluctant to ditch the chemicals.
The tiny Pacific island nation of Niue has plans to create a huge marine sanctuary to combat overfishing. It's one of several marine protected areas announced over past weeks.
Blades of ice rising from the ground up to several meters high: penitentes are a common sight in the Andes. How are these peculiar ice spires, named after their resemblance to religious orders doing penance, formed?
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