text: do you believe in global warming? why or why not? i don't want simple yes or no answers. i want explanations to back up why you think what you think. go ahead and try to convince me that you're right.  personally,i think it's complete bull. the world is always going through warmer and cooler phases. right now it's getting warmer because it's actually cooler than it was a long time ago. the reason the vikings were able to get to greenland so easily is that the world was warmer then and there was less ice. the world might be warming up a little bit but it's not man's fault and nothing bad will come of it. i think that the factual evidence in the core samples drilled from around the world say that the earth does have warm and cool cycles.  i also believe that it is possible that whatever is inhabiting the earth during these cycles will invariably affect them in some way, be it natural or non-natural emissions and/or by-products. i think that if it is "bad" or not is all relative to how you look at it.  will the weather be worse or more extreme? possibly.  is the earth trying to correct any imbalances?  possibly.  is this good or bad?  i guess it is how it will affect each individual.