World Bank: Weakening global economy will pull down energy and farm commodity prices. : The World Bank says that energy prices will drop 14.6% this year and 3.1% in 2020 and that farm prices will fall 4.7% this year and eke out 0.6% growth next year. The forecasts are sharply lower than what the anti-poverty agency was predicting in April. The global economy has been decelerating, weighed down by trade tensions and a slowdown in China, the world's second-biggest economy.