Running cars on used cooking oil

What new business or professional opportunities could a net zero future hold for you? 

Our business is around waste recovery from hospitality, we are looking heavily at circular opportunities. MCD was one of the first running truck on used cooking oil. Given the drive for net zero and fossil fuel price volatility there is an opportunity to look at new concepts. 

This new venture has an opportunity to be carbon negative, by converting brown grease to bio diesel. But I am still unclear on how that is calculated. If we keep 100 tones of waste out of the sewers and municipal treatment plants, that will have a mayor impact on utilities energy use to treat waste water, maintenance on the sewers etc. can we take credit for that?

-by Daniel Damme from UK