Impact on the environment
Electric Car, Hydrogen Car

The big attraction of electric or hydrogen-powered cars is the absence of CO₂ emissions during their use. CO₂ is released when electricity is generated in the case of the electric car, or when hydrogen is manufactured by electrolysis of water. Hydrogen can also be produced from natural gas, but in this case it is more advantageous to use natural gas directly as fuel for the vehicle, as the overall efficiency is much better.

As far as CO₂ is concerned, it's the quantity emitted per kWh that's important, not the place of emission, as this gas dilutes very quickly in the atmosphere. On the other hand, the pollutants emitted by internal combustion engine vehicles disappear for electric or hydrogen-powered vehicles, except for what concerns...