ClimateWire: A string of devastating natural disasters many are attributing to climate change has sent food prices on a roller coaster ride, leading to fears of a wave of climate-induced food price shocks of the sort that sparked rioting in the developing world two years ago. But international agriculture experts say those concerns are unfounded. Though they acknowledge dramatic spikes in wheat and corn, and new pricing pressure on rice, U.N. and other food policy experts say data show global food …