As well as getting it from sunlight, it also grows on trees…

A study, Sustainable Mallee Jet Fuel, commissioned by Airbus and undertaken at the Future Farm Industries Cooperative Research Centre, found that carbon emissions from jet fuel sourced entirely from mallee crops would emit 40 per cent less carbon than those using petroleum-based jet fuel.

It proposes using the mallee – a family of eucalypts that has a low-growing multi-stem growth habit – as the source of the oil to act as feed-stock for the jet fuel.

Fuel for jets DOES grow on trees • The Register.