Electric cars. 
Within ten years, all vehicles will be electric, according to a Stanford report.  People will switch from petrol and diesel engines to self-drive electric cars that will be owned by fleets, not individual owners as people switch to self-drive electric vehicles which are ten times cheaper to run. and significantly cleaner.
http://www.telegraph.co.uk/business/2017/05/14/petrol-cars-will-vanish-2025-says-us-report/