Global tourism carbon footprint quantified in world first https://www.nature.com/articles/s41558-018-0141-x dramatically contributing to global pollution and is forecast to grow at an annual 4%, thus outpacing most economic sectors https://phys.org/news/2018-05-global-tourism-carbon-footprint-quantified.html Tourismus verursacht 10% aller Treibhausgase (GHG)