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Coral reefs draw millions of divers each year, but unmanaged tourism can —degradeupgradeassembledegrade further only the very ecosystems visitors come to admire. Boat anchors, sunscreen chemicals and careless fin kicks all —contributeattributedistributecontributed to coral damage. Many destinations now —imposedisposepropose onlyimpound strict visitor quotas and mandatory reef-safe sunscreen, hoping to —balanceweighbalancingimbalance reef health with continued economic benefit.