"environmentally friendly" here means shifting pollution from the rich to the poor, i.e. from our western European cities to the countries where all the materials needed to produce the batteries and light-weight chassis are mined:
http://www.bbc.com/news/business-19830232
Myth: The Tesla uses a lot of graphite in their battery, which contributes to China’s pollution problem.
Actually: The logic here is: “Tesla batteries use graphite; the world’s biggest source of graphite is in China; China has terrible pollution; therefore, Tesla is partially responsible for China’s pollution.” Except when I did some digging, I learned that Tesla uses synthetic graphite made mostly in Japan and Poland, and that the average Model S uses 100kg of it. That 100kg lasts for ten years, so the amount of graphite used to make a Model S is similar to the amount you’d use if you had a few barbecues a year.