Audio: Why the US finds a global climate treaty so hard

Former UNFCCC boss Michael Zammit Cutajar explains why it is so difficult for the USA to fully engage in climate talks – and outlines the role he sees they could play in the lead up to 2015.

Former UNFCCC boss Michael Zammit Cutajar explains why it is so difficult for the USA to fully engage in climate talks – and outlines the role he sees they could play in the lead up to 2015.