Transcript:
Just think, Zoe... By the time your grandchildren's grandchildren's grandchildren's grandchildren are born, this will be completely biodegraded. If I'm going to use disposable diapers, the least I can do is make myself feel guilty about it.
How do they know? Such products haven’t been around long enough to accurately assess how fast they biodegrade. Most figures given are just estimates. Biodegradation depends on many factors — light, moisture, temperature changes, mechanical wear and tear and other factors.