One of the points people like to note is that electric cars are still releasing CO2 through the energy production to charge the vehicles. However, while gas cars must use fuel to run, and thus releasing carbon dioxide into the air every time they're in use, electric vehicles aren't limited to one source of energy. In my family, we own a fully electric car, and my carbon footprint is considered quite low, because every time we drive we hardly contribute any CO2. Also, electric vehicle owners have the choice to get their energy from different sources. Energy doesn't have to come only from fossil fuels. My family gets the energy to charge our car and run our household needs from wind farms. Another choice is solar energy. Even in the cases when people still choose to use conventional fossil fuel energy, the fossil fuels burned to create the energy will still amount to less CO2 emission than a car who produces large amounts of carbon dioxide every time it runs.

These are great points, but have you factored in the amount of carbon used to manufacture electric or hybrid cars compared to gas cars? It has been said that it takes more carbon to manufacture lithium- ion batteries, and that they are bad for the environment. It has also been shown that lithium is highly flammable and cobalt, also used in lithium- ion batteries, can be poisonous, and this can have a bad effect on the biosphere. While cars with petrol engines also emit a lot of carbon while being manufactured, it has been speculated that electric vehicles may emit even more.

Points! Yes, some solid arguments.  You seem to assume that the expected lifespan of the lithium ion cells used in the manufacturing of electric cars ends when the useful life of the car is exhausted or when the battery of the car no longer holds a charge sufficient for it's owner.  However, lithium-ion cells are able to be used for other activities such as storing energy from solar arrays.  The usable lifespan of these cells is greatly increased as more uses for them are realized. Also, even from an energy density standpoint, the amount of fossil fuels we use to run gas powered automobiles is grossly inefficient. Even though gasoline is a high density form of energy storage, conventional cars are only able to harvest 10-15% of the energy stored in gasoline.  This means that while manufacturing lithium-ion cells for electric cars may require an upfront expenditure in carbon, the perpetual waste of energy in our inefficient method of burning gasoline mean that in the long run, more carbon is still expended in a conventional gas car.