1.   But as the dust storms have grown, their impact has been spreading rapidly eastward, blighting the air over the Korean peninsula and beyond.

2.   But the impact may spread much further.

3.   But the impact may spread much further, affecting not only Europeans but many Americans, too.

4.   The impact spread debris and passengers over a wide area.

5.   The impact will spread well beyond the farms, however.

6.   The industrial impact is spreading beyond the area affected directly by the earthquake.

7.   Impact spreads quickly in Washington.