Mass tourism threatens coral reefs in tropical seas. Waste and sewage from hotels and cruise ships are released into the sea. But, tourism is also a source of income, and can thus help in protecting nature. Wageningen ecologists, economists and biologists develop a method to determine the correct balance between tourism and nature conservation. In the Dutch Caribbean and Sout-East Asia, they study how marine life responds to changes, and seek solutions in collaboration with local partners. How do you think tourism may contribute to nature conservation?