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ElJamoquio t1_j0nfdeq wrote

Reply to comment by billy_tables in World’s first net-zero transatlantic flight: Fly London to New York on used cooking oil. Rolls-Royce Trent 1000 engines will power the airline's flagship Boeing 787s as they fly from London to New York in 2023. by Zee2A

Your line of questioning really moves the goalposts. It's not net zero, even if it's a 50% reduction in CO2. It's taking in 100 units of CO2, along with 50 units of CO2 in transportation, fertilizer, etc. So it's a net of -50 thus far. It then outputs 100 units of CO2. So we're still worse off.

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billy_tables t1_j0nhjb5 wrote

Worse off than not flying - but not worse off than Jet A? There is a 100% reduction in CO2 emissions from the fuel burn, so all that’s left to compare is the fossil fuel consumption of the Jet A and Plant based supply chains.

Those are nothing to do with the fuel itself - in countries with a 100% nuclear energy grid that would be 0. In the U.K. we were 60% renewable today, by the time this fuel is meant to be mainstream here (2050) that will be 100%

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