Engines have been made to run on plant-oil fuels because no technology can be above natural laws without damaging or destroying life. Tests were done on 100 plant oils suitable for engine use and the molecular structure of these plant oils is ideal fuel for combustion as carbon dioxide, water, hydrocarbons, oxygen and plant nutrients are contained in a closed cycle. The plant oils don't need special preparation to be used as fuel and refining chemical processes are not needed - filtered virgin oil can be used as it is pressed. One litre of plant oil contains 110g of hydrogen - 1.5 times more than clean liquid hydrogen. So hydrogen technology is problematic, also having to be cooled down and kept at -253 C to be available in liquid form.
Plant oils are free from sulphur, heavy metals, benzol and aromatics.
The sun's energy is enough to grow oil plants and an area the size of Saudi Arabia could supply an equivalent amount of oil as crude oil. We see people suffering from problem that these cause everyday.