But new concerns have arisen over the last year or two.

Concerns about nuclear winter arose in the early 1980s from several reports.

The concern arose after a trip she made to Japan earlier this month.

Later, two other major concerns, which were not evident at the time, would arise.

Other concerns may arise in public hearings to be held next month.

Concern about the link between power lines and cancer first arose in 1979.

Concerns over the food industry's influence on the process have arisen before.

A different concern about water quality arose when mercury was discovered in fish during the 1980s.

Environmental concerns have arisen with the ongoing development of the area.

This concern and no doubt a myriad of others will arise in the days ahead.