Wonder drew a line between the increase of cancer and the ignorance of global warming. “I just feel that all these various diseases that we have and all that is happening in the world in part is because there are those who don’t believe in global warming, don’t believe that what we do affects the world,” he said. “Heat affects the world and affects us. I just hope that people will grow up out of the foolishness and know that we all, by how we think, how we view, how we treat others, we will never unlock the key until we truly let go of the hatred, the bigotry, the evilness, the selfishness. We do that and we can unlock some of those things that keep us in this place”.