By now, everyone of us have become familiar with what green vehicles are. Now as for comparisons between electric vehicles (EVs) and conventional engine-operated vehicles, it is a complex process. There is no single estimate that applies everywhere. However some basic comparisons can be like-

1) CO2 emissions from battery-powered vehicles are about 40% lower than internal combustion engine (ICE) vehicles. Emissions are even lower in countries which have large renewable power production and storage capacity. Electric vehicles offer a promising alternative to internal-combustion vehicles because they don't directly burn fossil fuels. 

2) EVs are also capable of producing instant torque and smoother acceleration than conventional vehicles. 

3) Electric Vehicles (EVs) aren’t without expenses however, the largest possible maintenance expense for an electric vehicle is a replacement battery pack. Unlike a conventional battery, EVs have large, complex rechargeable batteries that are drained and recharged constantly, which leads to degradation and range loss over time.

So are electric vehicles really eco-friendly with no emissions?

The answer is no, electric cars are not zero emissions vehicles. Although they do not emit CO2 while being driven, they might do it in 3 other stages which are during manufacturing as the need for mining activities to extract the rare earth metals that are used in batteries is very energy consuming and polluting; during energy production i.e., if the car is being powered with energy from burning fossil fuels, it is still releasing CO2 in the atmosphere, not from the tailpipe but from some distant power plant; and finally at the end of their life cycle as when it comes to batteries being recycled, it is still an expensive and ongoing process and most batteries are not being recycled yet.

So what can be the solution? The only plausible solution is to adapt to public transportation which seems to be a better option than using individual vehicles if we want to lower our carbon footprint.