Is your vehicle worse for the environment than an IC engine if the electricity you use comes from a coal-fired power plant?

First, the Oregon gets over 60% of it's electricity from hydroelectric power and only 8% from coal. Nationally, nearly 50% of our power comes from coal with only 6% coming from hydroelectric and 20% from nuclear. So, Oregon's energy sources are in general much cleaner than the national average. Second, even in the parts of the country that primarily use coal as an electricity source, electric vehicles reduce overall carbon emissions significantly. This is primarily due to the inefficiency of internal combustion engines as well as the relative overall efficiency of electric vehicles (electric motors, light weight, aerodynamic).