I don’t think that was his point. He is saying you can neither assume that this fee is enough to offset the carbon, nor that Ryanair will spend it appropriately

I don’t think that was his point. He is saying you can neither assume that this fee is enough to offset the carbon, nor that Ryanair will spend it appropriately. Just because it says carbon offset doesn’t mean all of the carbon is offset. If the true price were actually that low, it would be easy to solve.