why the area around Niagara falls has to be sustainably managed.
Niagara falls itself doesn't need to be sustainably managed because as long as it has the four lakes (lake Erie, lake Ontario, lake Huron and lake Michigan) it can sustain itself for a long time. The area around Niagara has to be sustainably managed, however, by people because otherwise it wouldn't be very nice for the tourists to go there. There is an environmental mission statement for the park which states that they have commit to doing things to sustain it such as: Conservation, Education, Environmental Management, Innovation, Preservation and Restoration. The reason for it they say it's to "improve environmental quality and sustainable development throughout the Parks system for the benefit of visitors, employees and associates".
Conclusion