Toyota Prius hybrid sales have tanked: here are 4 reasons why

2016 Toyota Prius - first drive, Laguna Niguel, CA, Nov 2015The Toyota Prius hybrid has been its maker's "halo car" and an example of its most advanced technology for two decades. Launched from an early-1990s project to halve the fuel consumption of a small car, its hybrid-electric powertrain pioneered mass electrification of passenger cars. But the sales arc of what has grown to be a family of Prius...