In the 19th century, many French vineyards sprayed a wine solution with copper in it to kill insects. It was only when French farmers planted vegetables there in the 20th century, and their harvests failed, that they realized what an inheritance their forebears had left them.
十九世紀，法國許多葡萄園噴灑含銅的「波耳多液」來殺蟲，廿世紀法國農民利用這塊地種植蔬萊，卻毫無收穫，才知道祖先留給了他們什麼好遺產。