We regularly review our strategy and performance with a view toward maximizing our efficient use of resources and our effective control of emissions, waste and land use, and to improve our environmental performance.
For example, in order to lessen the impact of our mining activities, we have targeted minimum environmental footprints for each mine to achieve by 2020. Three of our mines that were active in 2015 have already achieved their minimum environmental footprint. During 2015, we disturbed a total of 2,988 acres of mine lands worldwide and rehabilitated 3,233 acres. Alcoa Corporation’s business lowered its CO2 intensity by more than 12% between 2010 and 2015, achieving its target of 30% reduction in CO2 intensity from a 2005 baseline, a full five years ahead of target.
Alcoa Corporation is also committed to a world-class health and safety culture that has consistently delivered incident rates below industry averages. As part of Alcoa Inc., the Alcoa Corporation business improved its Days Away, Restricted, and Transfer (DART) rate—a measure of days away from work or job transfer due to injury or illnesses—by 62% between 2010 and 2015.