Public interest is shared by all citizens and beneficial for the general public. Public environmental interest (PEI), a human interest independent from the interests of personality and property, is the common good enjoyed by natural persons. Public Interest Environmental Litigation (PIEL) aims at guaranteeing rights to the environment, preventing and redressing the damages to the environment per se. PIEL should include neither environmental tort litigation based on personal and property rights nor animal rights litigation in which animal is the plaintiff.