Measures taken to lessen the impact of a development, e.g. planting of trees and bushes to lessen the impact of a development on the landscape.

medical treatment or devices that lessen the effects of an impairment. When determining whether a person is substantially limited in a major life activity, we ignore the beneficial effects of mitigating measures except ordinary eyeglasses or contact lens. Mitigating measures include things such as: medication, medical supplies, equipment, or applia [..]