31.   The blast was believed to have been caused by chemicals at the factory.

32.   The chemical could also cause upset stomachs and other minor discomfort.

33.   The chemicals cause irreversible brain, lung and kidney damage, leaving slack-jawed, glassy-eyed addicts stumbling through their lives.

34.   The ozone layer over the Arctic will not soon recover from damage caused by chemicals despite recent reductions in their use, according to scientists.

35.   A US satellite has confirmed that man-made chemicals have caused the ozone hole over the South Pole, scientists said Monday.

36.   Linda Wait, of Corelaine, Minnesota, said the chemical caused her to suffer thyroid disorders and diabetes.

37.   Low sperm count among some men and certain genital cancers could be caused by chemicals in pollution, the Institute for Environment and Health said Tuesday.