Deutsche Presse-Agentur: As environment ministers from across the world gathered in the Kenyan capital, the UN Tuesday warned that the global food crisis could be intensified dramatically by climate change. A report presented to over 100 environment minsters at a meeting of the UN Environment Programme (UNEP) said that by 2050 there could be 25 percent less food produced worldwide. Food prices could rise by as much as 50 percent within a few decades, causing even more misery for the poor, who can spend …