Stephan:   We are presently in a period of many bad trends but there are also some very exciting positive trends, and one of them is the rapid development of non carbon powered transportation. It will be very interesting to see how these two technologies parallel one another. I understand the positions of both Musk and Toyota and think it will get down to whichever develops the fastest and most convenient infrastructure. Personally, I think solar if it can include car charging will win out, as long as it is priced competitively. You wouldn't give it much thought and using it would not have a bad impact on the Earth. I can't imagine anything simpler than putting your car in your driveway or garage and have it charged and ready the next day, so that basically other than an initial installation cost and some ongoing small maintenance cost it would be free. An entire toxic network of pipelines, gas stations, flammables on road and rail, and all the waste disposal would disappear