Fiona Harvey is an award-winning environment journalist for the Guardian. Prior to this, she worked for the Financial Times for more than a decade. She has reported on every major environmental issue, from as far afield as the Arctic and the Amazon, and her wide range of interviewees include Ban Ki-moon, Tony Blair, Al Gore and Jeff Immelt.
Gordon Conway is a Professor of International Development at Imperial College, London and Director of Agriculture for Impact, a grant funded by the Bill & Melinda Gates Foundation, which focuses on European support of agricultural development in Africa.
Andy Wales is senior vice president sustainable development for SABMiller plc, one of the world's largest brewers. He leads the group's approach to prioritising economic, social and environmental issues within the group's strategies and business plans, including risks such as water scarcity and opportunities such as promoting local economic growth through smallholder farming.
Jo Confino is an executive editor of the Guardian and chair of Guardian Sustainable Business. He also advises Guardian News & Media and Guardian Media Group on their sustainability strategies.
Camilla Toulmin is director of the International Institute for Environment and Development. An economist by training, she has worked mainly in Africa on agriculture, land, climate and livelihoods, mixing research, policy analysis and advocacy. Her work has aimed at understanding how environmental, economic and political change impact on people's lives, and how policy reform can bring real change on the ground.
Herbert Oberhänsli was educated at Geneva and St. Gallen where he graduated with a PhD in economics. He went on to work at the Swiss Institute for International Economics at the University of St. Gallen. In 1982 he joined economics department of the Federal Office for Foreign Economic Affairs. And moved to Nestlé in 1985 he moved to NestlÃ©, as deputy head of investor relations. He's held his present position since 2010.
Gerard Payen has been working for more than 25 years to solve water issues in many countries all around the globe. Today, he works to mobilise the international community towards improving water and sanitation services mainly as adviser to the UN Secretary General and as president of AquaFed, the International Federation of Private Water Operators.
Global head, water, International Finance Corporation
Director of campaigns, WWF UK