The Lord of the Rings is the title of a movie trilogy, which is based on the books written by J. R. R. Tolkien. The first of the three films was shown in cinemas in 2001. The films fall under the fantasy genre and follows the hobbit Frodo and his friends as they embark on a quest to destroy a powerful, magic ring. They must eliminate the ring in order to prevent Sauron, an evil ruler, from getting it, as Sauron will use the ring to rule over Middle-earth.
When first looking at your question, people might feel a bit bewildered, as there is no obvious environmental issue in the film. However, when looking more closely at the film, you could argue that there is indeed a hidden environmental issue: people’s desire to destroy nature purely for personal gain. You might want to point out that the Shire, the area where the hobbits live, is situated in a beautiful landscape, with a lot of meadows, plants and trees. This could signify that they are a people who are not tempted by money and power and who are therefore able to live in harmony with nature. You could contrast this with Sauron, who lives in Mordor. Mordor has no plants or trees; instead, the land is dark and barren. You could interpret this lack of nature as representing the selfishness of those who want to become more powerful and will not shy away from destroying nature in order to be successful. Perhaps you could compare this to the environmental problems related to the destruction of the rainforest, which is ultimately also the result of selfish people only thinking about their own personal and financial gain.
In the film, this problem is solved when Frodo eventually manages to destroy the ring. Interestingly, the ring is destroyed by falling into a volcano. You could interpret this as a symbol for nature taking revenge on those who try to destroy it. Therefore, you might want to argue that the film shows the audience that nature must be respected and that harming nature for personal gain will ultimately hurt ourselves.