Mitigation - (noun)
(1) Making something less harmful or unpleasant. (2) Legal: Something that causes a crime to be judged less severely or harshly.
Source: Adapted from Cambridge English Dictionary
Example of Use: (1) The job creation programmes mitigated the effects of the recession in the region. (2) The defence lawyer said that in mitigation his client had been under intense stress attempting to save the company from bankruptcy.