About
Microplastics — plastic particles smaller than 5mm — are the most pervasive pollutant in Earth's ecosystems. They originate from the breakdown of larger plastic items (UV radiation and wave action fragment plastic bottles, bags, and fishing nets into progressively smaller pieces) and from primary microplastics (microbeads in cosmetics, synthetic textile fibers from laundry, tire rubber). Approximately 8 million tonnes of plastic enter the ocean annually; an estimated 51 trillion microplastic particles now pollute the ocean.
The human health implications are still being determined: microplastics have been found in human blood (2022 study, University of Amsterdam — found in 77% of samples), human placentas (2020, Italian study — found in all 6 placentas examined), human lungs, feces, breast milk, and the deepest ocean trench (Challenger Deep, 10,994m). The smallest microplastics (nanoplastics, <1 micron) can cross the blood-brain barrier. Health effects being investigated: inflammatory response, endocrine disruption (from plastic additives like BPA, PFAS), and unknown long-term effects. The 'Great Pacific Garbage Patch' — a rotating gyre of plastic pollution twice the size of Texas — contains 80,000 tonnes of plastic, though most ocean plastic is dispersed rather than concentrated in patches.
# Top 10 microplastics facts
- 18M tonnes/year into ocean
- 251 trillion ocean particles
- 3found in human blood/placentas/lungs
- 4Great Pacific Garbage Patch
- 5synthetic textile washing (35% of ocean microplastics)
- 6tire rubber dust
- 7PFAS 'forever chemicals'
- 8BPA endocrine disruption
- 9deep ocean contamination
- 10plastic-eating bacteria (Ideonella sakaiensis)
Fascinating Facts
- ◆Microplastics were found in human blood in 77% of participants in a 2022 Dutch study — including particles of polyethylene terephthalate (PET, from water bottles), polystyrene, and polyethylene — the first demonstration that plastic particles can cross from the digestive tract or respiratory system into the bloodstream
- ◆Laundry is a major source of ocean microplastic pollution — a single wash cycle releases up to 700,000 synthetic fibers from polyester and nylon clothing, which pass through sewage treatment (too small to filter) and reach the ocean; approximately 35% of primary microplastics in oceans come from synthetic textiles
- ◆Ideonella sakaiensis, a bacterium discovered in 2016 at a Japanese plastic bottle recycling facility, can break down PET plastic using two enzymes (PETase and MHETase) — the first known organism to use plastic as a primary carbon source, potentially the evolutionary beginning of plastic biodegradation in nature
More in Nature4 related
5
Nature
Amazon Rainforest
The lungs of the Earth — the world's largest tropical rainforest.
Interest93/100
50
Nature
Mount Everest
The highest point on Earth — a brutal, beautiful monument to human ambition.
Interest82/100
41
Nature
The Great Barrier Reef
The world's largest living structure — a coral metropolis visible from space.
Interest79/100
25
Nature
Northern Lights
Nature's greatest light show — the Aurora Borealis dances across polar skies.
Interest76/100