What footprint?
Check out the approximate years it takes for common litter items found on the beach to biodegrade.
Cigarettes/Cigarette Filters (Butts) - 1-5 years
Plastic Food Wrapper/Containers - 20-30 years
Plastic water bottles - 450 years
Plastic bags - 10-20 years
Plastic caps and lids - 450-1,000 years
Plastic utensils - 450 years
Plastic straws and stirrers - up to 200 years
Glass bottles - 1 million years (estimated, exact time unknown)
Aluminum cans - 80-200 years
Paper bags - 1 month