NG powered vehicles are a proven technology that has been around for decades and even refueling could be easily accomplished with existing infrastructure. The big advantage is NG powered vehicles don’t have the very limited range that will always plague electric vehicles.
Range isn’t the problem with electric vehicles Tesla has one model that will go 250 miles on a charge and recharge in 30 minutes, and their second model the “S” will travel 300 miles between charges and has fast charge capability. The problem is the cost. To get a 300 mile range you currently have to pay about $70,000 dollars. Although, batteries are coming down in weight, increasing in energy density and lowering in cost every year. The latest technology, now in large scale testing will, if it holds up, more than double the energy density, while lowering the cost by 2/3. At that point a 300 mile range might come down to 25 -30 thousand and be a more practical option.