In addition to the effects on human health, ground-level ozone is known to adversely affect the environment in many ways. Damage caused by ground-level, or tropospheric, ozone should not be confused with stratospheric ozone depletion, an entirely separate issue. Ground-level ozone causes

• reduced yield for commodity crops

• damage to urban grass, flowers, shrubs, and trees

• reduced yield in tree seedlings and non-commercial forests

• increased susceptibility of plants to pests

• materials damage

• reduced visibility