How Bad Can I Be? is a song featured in The Lorax. It is sung by Ed Helms as the voice of the Once-ler and his family will sing the chorus. The song is about the Once-ler's business getting more bigger, so he builds a Thneed factory to help him speed up the process of making Thneeds. The factory pollutes the skies, making it hard for the Swomee swans to fly. It dumps schlopp (slop) into the water, making the Humming Fish dirty and hard to swim. He also cuts down all of the trees, making the Bar-ba-loots hungry. His acts causing pain to all of the Truffula Valley, and the creatures living there.