The picturesque, alpine country of Switzerland is aiming to step up its cooperation with China in the areas  of urban planning, water management, and combating climate change. It comes as China is planning to roll  out a nationwide carbon trading system by 2017 to cut emissions, building on the seven regional pilot  markets first introduced in 2013.

China is the world's biggest emitter of climate-warming greenhouse gasses  and has vowed to make use of market mechanisms to bring carbon dioxide levels to a peak by around 2030.

Our reporter Martina Fuchs sat down with Doris Leuthard, the Swiss Federal Councillor and head of the  Federal Department of the Environment, Transport, Energy and Communications, in Beijing, to talk about  how to confront these challenges together, as well as the potential to link the two countries' carbon trading  systems at some point in the future.