Holding back the world’s largest desert
The world's largest desert is growing. In the last century, the Sahara Desert expanded by more than 10%, now covering an area of more than 3.3 million square miles (8.6 million square kilometers) and spanning 11 countries in the north of Africa.
Kerstin Forsberg on why we must protect our sea
Ever since she was a child, Kerstin Forsberg has been fascinated by the ocean.
How NASA technology can help save whale sharks
Thousands of people around the world are lending a hand to help save the world’s biggest fish.
Toughest corals to save dying reefs
This marine biologist wants to use the world's toughest corals to save dying reefs
Cleaning up India's Lakes
From Google to garbage disposal: the environmentalist cleaning up India's lakes
A century of climate change in Patagonia
Explorer's mission to photograph a century of climate change in Patagonia
Indigenous trackers are teaching scientists about wildlife
Discovering new species in Chilean Patagonia
The wild deep: Discovering new species in Chilean Patagonia — before they go extinct
Spying on illegal loggers
How old cell phones are spying on illegal loggers
New plastic recycling method
Start-up devours pollution with new plastic recycling method
Call to Earth - CNN
Call to Earth is CNN’s commitment to reporting on the environmental challenges facing our planet, together with the solutions.