The Earth Liberation Front (ELF) is a group of people who care a lot about the environment and believe that humans are hurting it by cutting down trees, polluting the air and water, and hurting animals.
Sometimes, they do things that are very bad and illegal, like setting fires or tearing down buildings. They think this is the only way to get people to pay attention to the damage humans are doing to the Earth. However, most people do not approve of their actions because they can hurt people and cause destruction.
People who support the Earth Liberation Front believe they are helping to protect the Earth, but other people see them as dangerous and crazy. No matter what you believe, it's important to always treat the Earth with kindness and respect.