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This is greenwashing. Global aviation uses almost 100 billion gallons of fuel per year. If we even began to address a fraction of that with magic new fuels (which won't happen) it would require incredible amounts of growing, and if we had that sort of amount of agricultural capacity available on this planet, capable of producing crops at a price the aviation industry is prepared to pay, we wouldn't have any hunger on the world.
Don't fall for this. There isn't such a thing as green aviation. I'm not saying there should be no flying, but we can't carry on as we are and magic away the consequences. In particular, don't fall for the snake oil salesmen trying to distract you with appealing non-solutions
Hunger isn't a production problem, it's a logistics problem.
We could feed everyone on the planet... it's just not profitable to.
Hunger is a political problem. We have the ability to deliver food to every person in the world.
We choose not to.
... because those in charge (i.e. producers, companies) feels it's not profitable enough.
Who do you think "we" is in the equation? Do you think the average person wakes up in the morning and thinks to themselves "Should I feed the world today? Naaaahhh..."