21.   But when a series of much stronger ventings of noxious gases and ash began Monday, authorities ordered the evacuation of the southern half of the island.

22.   He told the committee that workers were exposed to noxious gases that came from rocks heated to extract mercury.

23.   It was the second such incident in the city in two days, and followed a string of noxious gas releases since the subway gas attack.

24.   Many of the vehicles, especially autorickshaws used as taxis, are old and spew a cocktail of noxious gases that doctors say cause respiratory problems.

25.   Mysterious noxious gases have been released several times in train stations and other public places, sickening hundreds.

26.   NEW DELHI, India -- A court asks the government to reduce emission of noxious gases from an oil refinery that is damaging the Taj Mahal.

27.   Scientists scan its crater rim with binoculars as clouds of noxious gases spew out.

28.   Shigeru Aoki, a Miyake Island official, said that along with continuing eruptions, the danger of mudslides and high levels of noxious gasses are the main concern.

29.   Six people were taken to hospitals Monday after an apparent release of a noxious gas in a Yokohama supermarket, police said.

30.   Since then, low-level volcanic tremors have periodically sent ash and noxious gases into the air.