对许多人来说圣诞树下的针叶是圣诞节期间祸害的根源,但是瑞典的化学家们已把这一祸根变为一年四季能从中受益的好事。亨里克·凯林和他在斯德哥尔摩大学的同事们发现,松树针叶可以用来作为一种无需维修保养的环境污染监测器,用以探测诸如含氯的杀虫 For many, the needles under the Christmas tree are the source of the scourge of Christmas, but Swedish chemists have turned this curse into a good thing that can benefit all year round. Henrik Kerin and his colleagues at Stockholm University found that pine needles can be used as a maintenance-free environmental pollution monitor to detect pesticides such as chlorine-containing insecticides