And it remains so to this day when compared to biodiesel, a fuel made from oils of plants and animal fat.

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Edgeley says it will use vegetable and plant oils, together with animal fats that are not fit for human consumption, all of which are independently audited and meet the government's sustainability criteria.

BBC: Artist's impression of the proposed plant

Despite spending his entire adult life in the U.S., Babar was still familiar with the Pakistani farm economy, thanks to his family, which owns the country's largest processor of grains and seeds and also includes flour mills, animal feeds, poultry farms and edible oils (canola, corn and sunflower).

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