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We should account for deaths from pollution, but if we are going to do that, we should be willing to do that for 99% of aviation fuel that has nothing to do with reserves & safety margins, in addition to fuel used to drive cars.

Any regulation short of "carry infinite fuel" will be a trade-off, and entail some risk and anyone involved in setting these knows that. Zero may not be our actual target or even possible, but it is a useful aspiration to ensure that everyone is pulling in the right direction.

We dont aim for 0. Zero means dont fly. one in every 100 years globally for all flights would be very safe.

On the contrary - commercial aviation does aim for perfection.

At 3x the number of deaths would be 0 because there would be no more flights.