Biofuels and the Price of Climate Change

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Brazil's has made ethanol brewed from sugar cane its answer to rising carbon emissions. But the falling oil price has been hitting its industry hard. We hear a report from Brazil's biofuels capital, Sertaozinho, about the effect this is having. We also speak to environmentalist and author, Gernot Wagner, whose new book, 'Climate Shock: The Economic Consequences of a Hotter Planet', looks among other things at the possibility of a new global carbon tax to set what he believes would be a more realistic price for fossil fuels. And we look at the rising levels of debt in Ghana and Uganda ten years after a G8 summit forgave the debt of many African nations. (Photo: Tractor harvesting sugar cane for bio-fuels in Brazil, Credit: Nelson Almeida/Getty Images)