Fleet rental company Enterprise is adding electric cars to their fleet and addition to other changes like renting by the hour and ride sharing:

WeCar car-sharing technology — complemented by Enterprise Rent-A-Car’s extensive local car rental network — provides an environmentally friendly transportation solution, whether it is for an hour, a day, a weekend or longer. Totally automated and membership-based, WeCar serves local businesses, universities and government offices looking to enhance their fleet management operations and sustainability initiatives.