1.   Even the onshore pollution seems normal.

2.   During the announcement by the two presidents Saturday in this remote and stunning park, pollution seemed a distant problem.

3.   In a state that uses bountiful wheat fields as a signature, widespread water pollution might seem incongruous.

4.   Why does ozone pollution seem at its worst in the summer?

5.   Living in an environment where pollution seems to be the norm, hearing loss due to exposure to loud noise is a problem we have to consider.

6.   When it comes to major international sporting competitions, however, air pollution seems to be a minor concern.