When Dr. Diesel invented the engine that carries his name he envisioned a stationary engine primarily used by farmers. The farmers would grow the plants that provided the vegetable oil that would power the diesel engine. At about this time the gasoline engine was becoming popular and, one of the by products of gasoline refining is petroleum diesel, so this became the main fuel for diesel engines.
I take deep fryer fat (used vegetable oil) given to me by local restaurants, filter the stuff and add additives, mix it half and half with pump diesel (B50) and pour into my vehicles. It's fun and though it may sound like a lot of work there are some real savings to be had. And so, we've come full circle, Dr. Diesel's engine is once again running on the fuel it was designed for. Bio Diesel is also ,in theory, carbon neutral.
I can never figure out how my geese are able to wander about with bare feet when it is - 25C outside.
On the subject of electric vehicles in my area electric scooters are VERY popular and I'm starting to see the odd Chevy Volt.