The are developing a long range battery with high mileage but so far the only practical cars are hybrids.
The best battery technology available for hybrids is lithium ion rechargeable batteries. No one bothered to check that the total amount of lithium mined each year in the world will support the manufacturing of enough battery packs to support 60,000 vehicles annually. That is assuming none will be available for other lithium ion battery users such as cellphones, laptop computers and other consumer electronics. It would also mean our DoD will not have lithium sulfur dioxide throwaway batteries constantly used by our soldiers to keep weight down and operate in extreme cold temperatures where battery chargers/AC is not gauranteed to be available. Technologists tend to not grasp the concept of logistics and commodity data in their business models. That is why many green technologies fail to come to fruition or mass production.
Hybrid: a Rube-Goldberg nightmare that admits electric cars are inadequate.
The are developing a long range battery with high mileage but so far the only practical cars are hybrids.
The batteries still have to be charged using electricity. How is that going to be generated, by coal, oil, solar, wind, or nuclear? If you want zero emission vehicles then we have to convert to hydrogen or natural gas powered vehicles.