Unfortunately, around half of the electrical energy supply in the USA is still generated from coal that creates more pollution to the atmosphere. Americans are trying to reduce their dependency on fossil fuel that is mostly imported from the Middle East. Department of Energy of the USA is giving incentives and grants to research institutes and energy companies to develop biofuel and/or build power plants that use renewable energy. The most promising projects are the Concentrated Solar Power Plants in Mojave Desert. One of them is the Ivanpah Solar Electric Generating System (ISEGS) built and run by an Israeli company BrightSource.
Even though electric vehicles do not directly emit CO2 gases, the source of energy that is used to recharge the battery may still come from fossil fuels. In addition, after ten to fifteen years of operation, the batteries cannot be used anymore. These spent batteries contain toxic materials that are harmful to the environment. They have to be recycled.