Correct Me if I'm Wrong!

Hey guys, how are you today?

Today, I have to make some sentences that "5 questions about ecotourism and endangered animals and habitat".
Also They also have to use an adverb clause; "after, before, when, while, even though, although, if, even if, because, until, by the time, etc..." For example. (etc. is short for et cetera which signifies that there are more in the list of examples)

Therefore, I wanna make sure that they are correct.


1. While they have the ecotourism, what should they be careful about?

2. Why do you think ecotourism is popular in recent years even though it is not always beneficial to local people and the ecology?

3. What can we do for endangered animals before they become extinct?

4. If endangered animals become extinct, what kind of problems will happen on the Earth? (Earth with a capital E would be about the planet or world like 地球 or 世界 while earth with a lower case e would be about the dirt in the ground like 土.)

5. Why are endangered animals' habitats is decreasing even though many people are protecting them?


Thank you.