Your browser is too old

We can't provide a great video experience on old browser

Update now

Video Description

Sean Lee Davis has heard about an invention that sounds too good to be true: a converter that turns waste cooking oil into biofuel. Having learned how the technology works, he sets off to deliver a portable version, relying on the machine to power his journey all the way from Singapore to Cambodia.

These learning materials are suitable for those studying CEFR Level B2