* The importance of environmental conservation: WALL-E also highlights the importance of environmental conservation. The film shows how the Earth can be restored to its former glory if humans take care of it. This could be seen as a metaphor for the real-world need to protect our environment and take steps to mitigate the damage we have done to it.
* The power of love and compassion: WALL-E is a love story between two robots, WALL-E and EVE. Their love for each other helps them to overcome the challenges they face and to find a new home for humanity. This could be seen as a metaphor for the real-world power of love and compassion to help us overcome challenges and build a better world.