(b) "Litter" means rubbish, refuse, waste material, garbage, dead animals or fowl, offal, paper, glass, cans, bottles, trash, scrap metal, debris, or any foreign substance of whatever kind and description, and whether or not it is of value. Any agricultural product in its natural state that is unintentionally deposited on a public highway, road, street, or public right-of-way shall not be deemed litter for purposes of this section or Section 32-5-76. Any other law or ordinance to the contrary notwithstanding, the unintentional depositing of an agricultural product in its natural state on a public highway, road, street, or right-of-way shall not constitute unlawful littering or any similarly prohibited activity.