He said global warming and shifting weather patterns could worsen the problems of encroaching deserts, drought, and food security in places that are already dry, including parts of Africa.

• 他说，全球变暖和气候变化可能进一步加重包括非洲部份地区在内的一些乾旱地区面临的日渐扩张的沙漠化、旱灾以及粮食安全等问题。