Coral reefs around the world are worth a staggering $172 billion dollars a year to the global economy. But does putting a price on nature mean coral reefs, coastal mangroves and virgin rainforests are more likely to be exploited rather than less?

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While the world remembers the fall of the Berlin Wall 20 years ago, one frontier of the Cold War remains intact; the demilitarized zone that separates North and South Korea. And it's become an accidental paradise for rare wildlife.

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Silent Sound completed her voyage through the Canadian Arctic on October 10, four months and four days after slipping her moorings in Victoria, BC. Captain Cameron Dueck gives CNN a report on his epic journey.

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Professional explorer Mike Horn has been to the ends of the Earth and back. Now his new challenge is inspiring a new generation to preserve the planet.

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Eco Solutions has won the Asia-Pacific Broadcasting Union's award for Climate Change reporting. Watch Kyung Lah's winning report on vanishing sea ice off the coast of Hokkaido, Japan, and how it is transforming local communities.

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From salt water irrigation to a meat-free diet, Eco Solutions' October show took a closer look at the different ways being formulated to conserve the planet.

• Salt of the Earth
  
• Meat-free lives
  
• Green planet