Euthanasia involves terminating a human's life when they are suffering from a terminal illness and living in intolerable pain. It can be done through lethal injection, withdrawing life support, or allowing the patient to refuse treatment. There is an ethical debate around euthanasia, as some believe it relieves suffering while others view it as wrong or against their religion. The document outlines four types of euthanasia and discusses arguments for and against allowing the practice.