It's about as stupid as believing that electric cars are good for the environement
In term of greenhouse gases, it is not good nor bad, since electricity can be from carbon neutral sources or not. However, and this is the main reason why I think they should be the only cars allowed in cities is that I don't like to pee in the same place I drink, that is, I don't like cancerigenous and toxic substances in the same place I breathe.About beign the only cars allowed in cities, this depends a lot on the city architecture / infrastructure.
In America (north and south), that's not possible in most cities, because distances are too big to be made by foot/bike and you can't have busses and subway everywhere. In Europe there is a different situation and people may be closer to banning cars.
Also those electric cars are too expensive for people to use, and in most cities of the world cars are the only mean of transportation available. In Brazil, if you don't ha e a car you basically can't work in most cities.or you have to spend3-5hours daily in buses and waking.
I agree that electric cars are not good for the environment now. The manufacturing of batteries causes more pollution than using normal cars. However, I believe in the long term this situation will change, and with further research/development those cars will be greener and more efficient.
What if we all have a chip, smaller than you can see on that picture of the article, and we don't know about it? Dogs also don't have a clue that they have a chip inside 
