Bloomberg: World hunger is expected to worsen as climate change hurts crop production and disrupts incomes, with food-price spikes due to extreme weather set to increase, charity Oxfam said. The number of people at risk of hunger may climb by 10 percent to 20 percent by 2050 as a result of climate change, with daily per-capita calorie availability falling across the world, Oxfam wrote in an e-mailed report today. The world risks cataclysmic changes caused by extreme heat waves, rising sea levels and depleted...