Dr Steve Wiggins is our guest. Dr Steve Wiggins is an experienced agricultural economist with interests in rural livelihoods, poverty, food security and nutrition who has worked extensively in Africa and Latin America. He leads work at the Overseas Development Institute on agricultural development, food prices and biofuels. Mr. Wiggins talks about spike food prices and the four major transitions that concern agriculture: the transition energy, water scarcity, the impacts of gas emissions and the consequences of climate change.