61.   Scientists say high levels of air pollution are to blame for the severe symptoms affecting people with asthma and hay fever.

62.   But the increasing threat of air pollution and the danger caused by those farmers who ignored the rules have meant a complete ban on stubble-burning.

63.   He says that the incinerator conforms to strict new guiidlines about air pollution set down by the Government.

64.   Dr Jane Wilde, director of the Health Promotion Agency, said greater air pollution may be to blame.

65.   He said the buses would cut air pollution and reduce sheep deaths from accidents with cars.

66.   Test results showed air pollution in Darlington was well below recommended safety levels.

67.   David Lyonette said he was surprised to find that bus diesel engines are thought to be major contributors towards town centre air pollution.

68.   Thought there was going to be a much look, see where it could eventually to control industrial air pollution from local industries.

69.   Along with lobbyists for steel, oil, and utilities, he is predicting dire economic consequences from tougher rules on air pollution.