Vaccines may soon make travel possible again. But how quickly will it return — and will it be forever changed? RUNGROJ YONGRIT/EPA Joseph M. Cheer, Wakayama University; Colin Michael Hall, University of Canterbury, and Jarkko Saarinen, University of Oulu The COVID-19 pandemic brought the global tourism industry to a screeching halt in 2020. With vaccines starting to be rolled out, there is hope international travel can resume soon, but exactly when — and how — is the million-dollar question. Before COVID-19, there was much concern about whether tourism had grown too big for our planet. There were calls to scale back tourism, make it more environmentally sustainable and help over-touristed…