If they didn't effect the environment, they would not be considered harmful.

However, other than being a nuisance, they are not considered harmful.

Stress and physical difficulty are considered harmful to the healthy development of pregnancy.

If the mother travels to market she leaves the infant behind, as the outside sun, air and dust are considered harmful.

Despite the discomfort to the woman, hot flashes are not considered harmful by physicians.

The level the Government considers harmful is 2.5 parts per million.

Madison, for instance, wanted a Congress with the power to veto any state law it considered harmful to the union.

It is clearly religious in nature and must be considered harmful to normal scientific activity.

The beam was considered harmful to personnel out to a distance of 212 feet.

Somebody is considered harmful to a society and is removed.