Time to call bullshit on this one. How the fuck would anyone know it takes 2000 years for a milk carton to decay? Did anyone plant one in the ground and check it every year? Everyone 10 years? What about everyone 100 years? I mean come the fuck on. How do you know some things wont decay? Have you personally done tests? Or just believing the bullshit that "scientists", aka people who make up shit half the time, say about a certain object. There is no proof that it takes said amount of years for ANYTHING to decay or decompose. Despite most of the shit we dump in the air, which I actually do believe to be harmful to the atmosphere in a way, theres no way I'm going to believe that putting something back into the earth where it originated, chemical properties changed or not, is going to harm the earth. Like I said, the earth is like a living, breathing, ever-evolving human being. It takes shit in, and fixes it, and shits it back out the way it used to be. And until that can be proven wrong, or until the day this mysterious 2000 year old milk carton finally decides to decompose and someone is there to see for it first hand, I will keep believing that its all bullshit.
edit: dont take offense, I'm not attacking you at all, just having a civil argument