1. Using resources carefully, judicially & giving them time to get renewed is called .................

2. We enjoy the beauty of mountains, waterfalls, sea, landscapes. Thus, they are resources which have ............. value.

3. Resources which can be renewed or reproduced are known as ..................

4. .................. resources are found in a region but have not been utilized, might be because of the lack of technology.

5. Using wind is an example of what kind of natural resource?

6. Which is NOT an example of humans modifying the environment?