21.  Experts think a major reason why those with asthma and hay fever are suffering more is car pollution.

22.  The company says the decline of British Coal is a major reason for the sale.

23.  The major reason for this is the poor growth of VZV in the available tissue culture systems which produce predominantly cell associated virus with low titer stocks.

24.  A major reason papers are fighting so haar for readers is the decline in sales as families like the buy fewer papers.

25.  And a major reason for that was comparative operating costs.

26.  Analysts added that it was a major reason why other producers were willing to make their cuts and why the cuts would stand.

27.  And analysts said Wednesday that employee opposition is a major reason why the merger may not go through.

28.  And in his speech on the House floor, Slattery said that case was a major reason he had changed his mind.

29.  And one major reason, the polls suggested, was broad public disapproval of the way Republican leaders in Congress have handled the Clinton investigation.

30.  And when the Cowboys were winning Super Bowls, Irvin was a major reason why.