Your comment is irresponsible and highlights how stuck in the system you are. There is no site that states CO2 levels have ever been above 400ppm. Your claim is baseless, uneducated, and not backed by any data. It's ridiculous you actually believe so. From a NASA release on May 21, 2013, "The global concentration of carbon dioxide in the atmosphere...has reached 400 parts per million (ppm) for the first time in recorded history" (and sorry, I know you don't believe NASA either because, well, the entire system is rigged against you and you and your small, speculative, unimportant faction is always right -- but in reality you're not). This is backed by a plethora of data from centers all around the world. Even the website Skeptical Science references a data set that shows no concentration above 300ppm in the past 400,000 years. You are being irresponsible with your claims all to be the leader of a defunct and backwards following that will keep society from progress.