In some cities, as many as one in four office spaces are vacant. Some start-ups are giving them a second life – as indoor farms growing crops as varied as kale, cucumber and herbs.

As climate change makes rainfall more intense and infrequent, Catalan authorities are battling to provide security and drinking water to millions.

Here's how the polar vortex, and climate change, influence extremely cold winter weather in the US.

With Antarctica's climate warming at an unprecedented rate, scientists are battling with dangerously thin ice and equipment falling through into the sea.

Here are some of the words and phrases the BBC encountered this year that helped to unravel the changes taking place in world around us.

Equatic is among a wave of start-ups exploring how the ocean could be harnessed to capture and store carbon. But not everyone is sure it's such a good idea.

Global temperatures rose and extreme weather ramped up, but there were also some significant breakthroughs for the climate this year.

The Boiling River regularly reaches 86C – with drastic consequences for the surrounding rainforest.