Just to play the devil's advocate for a moment, I'd suggest that an electric vehicle isn't quite as environmentally righteous as some suppose. It's been noted that because of the greater carbon emissions required to produce an electric car, they are only about 20% less carbon polluting over the lifetime of the vehicle. (20% is a significant improvement certainly.) I just point that out because I've met more than a few electric car owners who think the carbon differential is greater. Here's a link to details if interested. Yes I know the Guardian is very left of center. I linked to that particular studies referral to allay suspicions that only right of center climate change deniers would publish such a thing. 
https://www.theguardian.com/football/ng-interactive/2017/dec/25/how-green-are-electric-cars
As to Steve's point about Superchargers availability every 100 miles, that's only true in certain areas and transportation corridors. I looked at Tesla's map last week and was noted how Superchargers are limited to Interstate corridors in parts of the southern US. In large swaths of the American west, it's a similar story. I imagine availability will continue to improve as electric vehicles become more common. To some degree, the availability of Superchargers is a map of affluence in the US.
Thanks for sharing that, it's one of the few reports I've seen that includes all of the energy supply chain. There's a multitude of Tesla forums and most owners confess that saving the planet isn't the principal motivation for buying one, it's the fun/performance/technology benefits - taking the forthcoming Roadster as an example: it outperforms the Bugatti Veyron (acceleration, range) at a price of $250k vs $3million respectively. If you trickle this down to other models similar comparisons with equivalent ICE's also exist.
The best option, from an environmental perspective, is solar. My house will need a new roof in the next few years and I've done the following rough calculations to install solar tiles (based on Tesla Power estimates):
Solar Tiles (60%) Regular Tiles (40%) - $85k
Tesla Power Wall (Battery) - $10k
Total Installation Cost - $95k
Cost Savings - Tax Credit $21k, Energy generated (30 years) $54k
Total Savings - $75k.
TOTAL COST ($95k - $75k) $20k
Cost of regular roof - $20k.
So, for me, the numbers currently don't excite me enough to go solar. The incentive needs to be much higher than this....