Vinyl stickers are made from polymers/petroleum oil and take hundreds if not thousands of years to break down and degrade.  Once they degrade, those microscopic polymers enter the food stream where animals, fish and birds inadvertently (i.e, ocean plankton) eat them - wreaking havoc either with their DNA or killing them since the polymers are undigestible.

Yes, no doubt, vinyl lasts much longer than normal stickers, especially if they are screen printing, but, SO WHAT - is a slightly longer lasting sticker worth the long-term damage our children and their children and children's children will be forced to deal with.