Everything causes cancer. Don't you guys watch the news? Breathing, water, eating too much, eating too little, playing cards, laughing, having fun, magic, microwaves, the president, movies, gas, rubik's cubes, the sun, arsenic, nuclear explosions, black people, white people, Asian people, brown people, aliens, stupid people, pineapple, the color blue, light, dark, America, not America, being too happy, death, cancer, AIDS, money, and there are others but I can't think of anything else right now. You probably get the idea