If your primary car is a Ford Focus Electric, here's the most sustainable option for making occasional, longer trips. An even better idea is for a few FFE owners to pool their $7500 tax credits and buy one of these gasoline-only Fiestas, to SHARE!! Or, even better yet, all Ford dealers could keep a few of them on hand, for FFE owners to rent.
http://www.greencarreports.com/news/1088015_2014-ford-fiesta-ecoboost-priced-45-mpg-highway-too
...IN FACT, the dealers could give us 2 weeks/year of free Fiesta loaners, similar to what Nissan is offering Leaf owners, in the UK: "Leaf owners can borrow a gas- or diesel-powered Nissan for free for as long as two weeks a year during the first three years of Leaf ownership."
http://green.autoblog.com/2013/12/02/nissan-tries-something-new-with-leaf-ev-shoppers-in-uk/
http://www.greencarreports.com/news/1088015_2014-ford-fiesta-ecoboost-priced-45-mpg-highway-too
...IN FACT, the dealers could give us 2 weeks/year of free Fiesta loaners, similar to what Nissan is offering Leaf owners, in the UK: "Leaf owners can borrow a gas- or diesel-powered Nissan for free for as long as two weeks a year during the first three years of Leaf ownership."
http://green.autoblog.com/2013/12/02/nissan-tries-something-new-with-leaf-ev-shoppers-in-uk/