Plant leaves absorbed microplastics and nano plastics directly from the air.
The particles subsequently entering the food chain through herbivores and crops consumed by humans.
The Microplastics are defined as plastic particles measuring up to 5 millimetres in diameter, while Nano plastics are even smaller, less than 1,000 nanometres.
Stomata are small pores formed by specialised cells.
The cuticle is a protective membrane coated in wax, which makes it particularly conducive to absorbing microplastics.