Pest control A dynamite idea

摘要

It is a long time since diatomaceous earth was used only by fullers to remove the grease from wool. Its most famous job was probably as the inert agent into which Alfred Nobel absorbed nitroglycerine to make dynamite. But the mineral, which acquired its name because it is composed of the skeletons of minuscule dead plants called diatoms, may be about to enjoy another, less explosive, career as an alternative to insecticides in poor countries.