“Since the idea of packaging is to protect food from bacteria,” Andrady observes, “wrapping leftovers in plastic that encourages microbes to eat it may not be the smartest thing to do.” But even if it worked, or even if humans were gone and never produced another nurdle, all the plastic already produced would remain— how long? “Egyptian pyramids have preserved corn, seeds, and even human parts such as hair because they were sealed away from sunlight with little oxygen or moisture,” says Andrady, a mild, precise man with a broad face and a clipped, persuasively reasonable voice. “Our waste dumps are somewhat like that. Plastic buried where there’s little water, sun, or oxygen will stay intact a long time. That is also true if it is sunk in the ocean, covered with sediment. At the bottom of the sea, there’s no oxygen, and it’s very cold.” He gives a clipped little laugh. “Of course,” he adds, “we don’t know much about microbiology at those depths. Possibly anaerobic organisms there can biodegrade it. It’s not inconceivable. But no one’s taken a submersible down to check. Based on our observations, it’s unlikely. So we expect much-slower degradation at the sea bottom. Many times longer. Even an order of magnitude longer.” An order of magnitude—that’s 10 times—longer than what? One thousand years? Ten thousand?”
―
Alan Weisman,
The World Without Us
