Researchers have found dramatic effects caused by climate change on Norway's Svalbard Archipelago. Rising temperatures have allowed the permafrost to thaw. Soon, the North Pole could be ice-free in summer.
As frigid air sweeps across Europe, the Arctic itself is seeing an unprecedented warm spell. What's going on and does it relate to global warming?
The two Nordic nations will explore building the first rail connection from a European Union member state to an Arctic Ocean port. The link would cost around around 2.9 billion euros ($3.6 billion).
Bubbles of highly-flammable methane frozen in iced-over lakes are a strange yet stunning natural phenomenon – but can be dangerous if popped. They also harbor problems for the environment.
From rising sea levels to megastorms and drought, how five cities around the world will face their own struggles to adapt to a warming planet.
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