Eco- travel is traveling to natural areas and improve the well-being of local people. parallelism!
 they walking, hiking, or riding animals rather than riding buses or cars. 헐..
They also planting trees and provide financial benefits to local people. 문법 자꾸 파괴해라.

They also know how to protect the environment well. 는 무슨 말일까?

In the lecture, the professor explains how eco-travel helps the environment. Eco- travel is traveling to natural areas and improving the well-being of local people. The professor gives two examples.
First, eco-travel helps to reduce pollution. When people move to another area, they walk, hike, or ride animals rather than ride buses or cars. They also planting trees and providing financial benefits to local people.
Second, people can learn about the environment and culture of the area. So, they are looking for various measures to protect the environment for the next generation.

In the lecture, the professor explains how eco-travel helps the environment. Eco- travel is traveling to natural areas and improving the well-being of the local people. The professor gives two examples.
First, eco-travel helps to reduce pollution. When people move to another area, they walk, hike, or ride animals rather than riding buses or cars. They also plant trees and provide financial benefits to local people.
Second, people can learn about the environment and culture of the area. They also know what is good or bad for the environment. So, they are looking for various measures to protect the environment for the next generation