Despite the slow but steady increase in the number of enterprises claiming to be responsible or green, the fact remains that the current system of mass international tourism is utterly unsustainable. The industry resembles a high-speed train racing toward a cliff edge, crammed with passengers with cheap tickets. International tourism has exploded in size since the 1950s and swept into virtually every nook and cranny of the planet, washing up cash, jobs, golf courses, airports and enormous amounts of real estate. Undoubtedly, tourism continues to be a stimulant of economic recovery, generating more than $2.1 trillion in annual revenues. In many countries and regions of the world, tourism is now the primary source of foreign exchange, employment and cash.
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