As the UK energy secretary, Ed Davey, and ministers from 194 countries arrived for the high-level segment of the talks, the UN's Committee on World Food Security said the world would need a 75-90% increase in food production to feed the extra 2 billion people expected to be alive in 2050. But climate change could reduce yields worldwide by 5-25% over the same period.
"The poor are especially vulnerable. Climate change will increase the number of malnourished children substantially. Smallholder farmers will be particularly hard hit," said Gerald Nelson, a spokesman for the high-level panel of experts convened by the committee to report on food prospects in the coming 30 years.