Conservationist (noun)

1. A person who advocates or works to protect and preserve the natural environment and resources.
2. A person who is dedicated to the protection and preservation of natural resources and cultural heritage.

Origin:

Late 19th century: from conservation + -ist.

Examples:

1. He is a conservationist who has been working for the protection of endangered species.
2. She is a conservationist who is dedicated to the preservation of cultural heritage.
3. The conservationist group is working to protect the natural environment.
4. The conservationist movement is dedicated to the preservation of natural resources.
5. The conservationist organization is working to protect the environment and natural resources.