How can tourism positively affect the conservation of forests? explain in a couple sentences.

In most nature reserve parks and places, the requirement for entrance fees is one way of positively conserving the forest. The money is invested back to tend and care for the forest and other improvement services required. This is called ecotourism.  

Ecotourism attempts to minimize the bad effect of tourism by continued research in sustainable tourism. It is conducted by partnering with a different environmental organization, student and university to find different methods of promoting sustainable tourism. The research can be incorporated during assessments and tourism planning.