And at the same time to scrap inefficient old planes, so that if they were otherwise to come back in the air, they would waste more oil, and block the uptake of efficient, new planes.
I u isto vrijeme "umiroviti" stare neefikasne zrakoplove, jer ako bi ostali i dalje u upotrebi samo bi trošili puno goriva, blokirajući tranziciju novim efikasnim zrakoplovima.