I know this whole process has been a cause of great worry and anxiety for them and their loved ones. (totalpolitics.com)
Today we live behind walls and doors that are so air tight they ironically are making the air inside as great a worry as it is outside. (remonline.com)
This was also before the range and weight of pollutants in the air were as great a worry as they are today. (remonline.com)