Diesels sadly enough, will be the short term solution to our consumption on fuel.

It's not only lower on carbon emissions, per litre of diesel, it's able to travel almost twice as far now compared to petrol.

But the disadvantage still holds -> Heavy diesel cylinder block means heavier steering and less handling characteristics compared to the petrol equivalent, clattery engine while stationary [especially for 4-cylinder diesels], and still higher Nitrogen Oxide emissions [which is cancerous].