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More than 90% of table salt brands contain microplastics, according to a new analysis by Greenpeace East Asia.

That means that every time you sprinkle some salt on your food, there’s a good chance that a rogue bit of microplastic has made it onto your plate.

The same study estimates that the average adult consumes 2,000 pieces of microplastic from salt each year. An earlier study estimated that the average person consumes 70,000 microplastics each year overall, and yet another study found that both tap and bottled water sources contain microplastic particles more often than not.

Take Action: Take the Plastic Pledge: #UnplasticthePlanet

The Greenpeace analysis looked at 39 brands of table salt and found that 36 contained microplastics. The highest concentrations of microplastic were found in brands from Asia, and sea salt had more microplastic density than rock or lake salt.

Indonesia, which has been ranked the second-most polluted country in the world, had the most plastic-riddled salt.

It’s not that salt is uniquely susceptible to attracting microplastic. Instead, the contaminant is found in such high quantities because it pervades the global environment. For example, scientists have determined that more than 50 trillion microplastics are in the world’s oceans.

That’s more than 500 times as many stars as there are in our galaxy.

Even insects carry microplastics as they fly around.

Read More: Even the Most Remote Region in the World Is Polluted With Plastic

On the bigger size of the spectrum, microplastics are no larger than a grain of salt, and most are invisible to the human eye.

They’re often produced for use in beauty products as an exfoliating device, but they’re also generated through the natural breakdown of plastics in the environment.

As plastics degrade, they break apart into smaller and smaller pieces. Since plastic takes hundreds of years to break down, these microplastics accumulate in the atmosphere.

And other times microplastics are created through everyday practices.

A single load of laundry, for example, can release 700,000 plastic fibers into the air.

Read More: A Turtle's Chance of Death Skyrockets With Each Piece of Plastic It Ingests

Scientists are still unsure of the health consequences of ingesting so much plastic, according to National Geographic.

But microplastics become a magnet for pollution when in the environment, collecting agricultural pesticides, chemicals from industrial plants, greenhouse gas emissions, and more.

Plastic is also known to be composed of substances toxic to human health.

Read More: 47-Year-Old Plastic Bottle Washes Up on Shore Looking 'Almost New'

“The ocean is the lifeblood of our planet, yet we are poisoning it with millions of tonnes of plastic every year,” Peter Thomson, the president of the UN General Assembly, said earlier in the year.

“Be it a tax on plastic bags or a ban on microbeads in cosmetics, each country [can] do their bit to maintain the integrity of life in the ocean,” he added.


Defend the Planet

Over 90% of Table Salt Brands Contain Microplastics: Report

By Joe McCarthy  and  Erica Sánchez