The impacts of climate change continue to challenge and reshape the planet, as global warming melts glaciers and rising sea levels submerge land masses.

In recent years large sections of the Swiss-Italian border made of glacier ridgelines or areas of perpetual snow are melting, causing natural geographic boundaries to shift, and now both countries are working to redraw the border line.

• Guest: Gaia Vince, Science Journalist and Author of 'Nomad Century: How Climate Migration Will Reshape Our World'  
• Producer: Madeleine Hanger