Superhero comics often require a certain suspension of disbelief. Even beyond believing someone can fly or stop bullets with their mind, comic readers often need to proceed under the conceit that places like the Marvel Universe continue to be similar to our world, even though they are rife with impossible science, magic and other assorted super powers. However, Doctor Doom #1 recently touched on a major taboo in the Marvel Universe that may be a push too far for some readers: global warming.