Eco-terrorism refers to the use of illegal actions, often violent, to protect the environment or promote ecological causes. This can include activities like sabotage, property destruction, or threats aimed at corporations or governments that are perceived to harm the environment. Groups involved in eco-terrorism believe that such actions are necessary to prevent environmental degradation and to raise awareness about ecological issues. The term is controversial, as some view these actions as extreme measures taken in defense of nature, while others see them as criminal acts that undermine legitimate environmental efforts. Notable groups associated with eco-terrorism include the Earth Liberation Front and the Animal Liberation Front, which have been linked to various acts of property destruction in the name of environmental protection.