I really can't stand this argument--either "global warming is a natural cycle" or the slightly better but still annoying "it's a natural cycle but humans are accelerating this natural cycle".
The latter argument is repeated time and time again on Yahoo. Many people say that their teachers told them this, which scares me. Are teachers really so dead set on presenting "both sides" of the issue that they're willing to say such a meaningless claim, a claim which is completely baseless in scientific fact?
Do you think the science teachers who tell their students this actually believe it, or are they mostly being pressured by an ignorant principal to give "equal balance" to global warming science?