Reduced pollution is among the many advantages of electric cars: they are better for the environment than all the other alternatives currently on the market, because they are the only technology that totally eliminates local nitrogen oxide (NOx) and fine particulate matter (PM) emissions. This translates into cleaner air, reduced impact on health, and lower medical costs. As well, electric cars are quiet: by cutting noise pollution, they improve quality of life.
Currently in Italy, 33% of the power supply comes from renewables. This means that the estimated “well to wheel” emissions of an electric car are about 70% lower than those of a gas vehicle and about half those of a methane vehicle.
So the short answer to the question of whether or not electric cars pollute the environment is “a lot less than gas or hybrid cars”.