Many of Europe's butterflies are in danger

摘要

However,such serious incidents are rare in practice.This one is attributed to the spontaneous explosion of residues of ethylene stored in a pressure vessel and not connected with the experimental procedures being carried out nearby.Chemistry,it may be argued,has been saddled with an undeserved reputation for being dangerous to study.It has been claimed that stories of accidents in laboratories tend to perpetuate out-of-date myths.