We’ve heard about planes powered with cooking oil, but what about jet fuel made entirely from human poop? Firefly Green Fuels, an aviation company based in Gloucestershire, UK, has created just ...

What Causes Green Poop? Your poop can sometimes have a slightly greenish hue, or even be a more vivid green. Most of the time, green or greenish poop is normal. Diet and green poop.

We’ve heard about planes powered with cooking oil, but what about jet fuel made entirely from human poop? Firefly Green Fuels, an aviation company based in Gloucestershire, UK, has created just ...

Firefly Green Fuels, a UK aviation company, has developed a jet fuel made entirely from human poop. Firefly Green Fuels, a UK aviation company, ...

We’ve heard about planes powered with cooking oil, but what about jet fuel made entirely from human poop? Firefly Green Fuels, an aviation company based in Gloucestershire, UK, has created just ...

Firefly Green Fuels, a UK aviation company, has developed a jet fuel made entirely from human poop. Firefly Green Fuels, a UK aviation company, ...

Firefly Green Fuels, an aviation company based in Gloucestershire, UK, has created just that – and, unsurprisingly, the prospect of poop-powered planes is attracting attention.

By Nell Lewis, CNN (CNN) — In the race for alternative, sustainable jet fuels, some companies are getting creative. We’ve heard about planes powered with cooking oil, but what about jet fuel ...