Greevil is a concept created by Dr. Heinz Doofenshmirtz. It is living a lifestyle that is both green and evil. He uses this word in reference to his "Evaporator-inator" which is made completely out of recycled plastic bottles. It is also greevil because is uses solar energy as its power source. The greevil symbol is the same as a recycling symbol, a green triangle made of arrows.