ATLANTA — Hartsfield-Jackson International is again the world’s busiest airport, reclaiming the title Atlanta lost when traffic plummeted during the pandemic. The Atlanta airport reported more than 75 million passengers in 2021, a far cry from pre-pandemic levels that topped 100 million a year. But other airports around the world are also still recovering. Last year, Atlanta handled the most passengers and the most flights of any airport in the world, according to the official rankings released Monday from Airports Council International. Hartsfield-Jackson reclaimed the title after an airport …