Ecotourism is a booming business that many tour operators cite as being helpful about at by down in of on to under with nature. Every year, millions about at by down in of on to under with people descend about at by down in of on to under with protected and pristine natural areas to observe rare species. However, a new report casts doubt about at by down in of on to under with the value about at by down in of on to under with this form about at by down in of on to under with tourism. In fact, it suggests that ecotourism is more damaging than helpful about at by down in of on to under with nature. Details are about at by down in of on to under with a report published about at by down in of on to under with the journal 'Trends in Ecology and Evolution'. Researchers believe tourists are disrupting animals about at by down in of on to under with their natural habitat. They pointed about at by down in of on to under with a recent event where sea turtles in Costa Rica had problems laying their eggs because about at by down in of on to under with the hordes of tourists who had congregated to watch the turtles' nesting habits. The report says that ecotourism is making animals bolder and that this could endanger the animals. A regular human presence might make animals tamer and less cautious about at by down in of on to under with other animals around them, and this could put them about at by down in of on to under with risk of being attacked about at by down in of on to under with their natural threats. "Then they will suffer higher mortality when they encounter real predators," the report says. It added: "When animals interact about at by down in of on to under with 'benign' ways about at by down in of on to under with humans, they may let about at by down in of on to under with their guard." The report said it was essential, "to develop a more comprehensive understanding about at by down in of on to under with how different species about at by down in of on to under with different situations respond to human visitation and about at by down in of on to under with what precise conditions human exposure might put them about at by down in of on to under with risk."