摘要
蜜蜂和其他传粉昆虫利用气味追踪鲜花。空气污染物会淡化甚至搅乱这些气味。科学家们曾经担心这可能导致某些传粉昆虫觅食更加艰难。而且事实上，一项新的研究得出结论，某些情况下传粉昆虫要付出四倍的努力才能找到食物。
Bees and other pollinators use scents to track down fresh flowers. Air pollutants can weaken or even scramble those scents. Scientists had worried that this might make it harder for some pollinators to find a meal. And indeed, a new study concludes, in some cases it could quadruple the pollinators＇ effort.
