Media playback is unsupported on your device

Making a mark: What's your number?

Climate negotiators from around the world are in Bonn to work out some of the gaps in last December's landmark Paris climate deal.

Meanwhile in the UK, activists are getting tattoos to highlight the rising level of carbon dioxide in the world's atmosphere.

Video journalist Paul Harris went to meet them to find out more.

  • 24 May 2016
Go to next video: Undrawing my tattoos