The article says "in addition to reducing carbon emissions" in regard to the Tesla. I can't see how electric cars actually reduce pollution/emissions of any kind.<p>Typical coal -> electricity is 33% efficient, but can be up to 50% [1], electricty to battery is 75% [2], and electric motors are about 92% [3]. The typical efficiency will be .33 * .75 * .92 = 23%, with a maximum of 35%. Gasoline engine efficiency is 25 - 30% [4], so we aren't really improving pollution much with electric cars, until wind/solar makes up a substantial part of our grid.<p>Now it will certainly _move_ the pollution from the cars in the cities to the power plants elsewhere (which is a good thing), but it really isn't preventing pollution.<p>[1] <a href="http://en.wikipedia.org/wiki/Fossil-fuel_power_station#Basic_concepts" rel="nofollow">http://en.wikipedia.org/wiki/Fossil-fuel_power_station#Basic...</a><p>[2] <a href="http://www.futurepundit.com/archives/006554.html" rel="nofollow">http://www.futurepundit.com/archives/006554.html</a><p>[3] <a href="http://www.engineeringtoolbox.com/electrical-motor-efficiency-d_655.html" rel="nofollow">http://www.engineeringtoolbox.com/electrical-motor-efficienc...</a><p>[4] <a href="http://en.wikipedia.org/wiki/Engine_efficiency" rel="nofollow">http://en.wikipedia.org/wiki/Engine_efficiency</a>