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This is the Tom Hartman program.

And welcome back to the program on the line with us is Matt Simon. He's a science journalist with

Wired magazine in the author of the new book, a poison like no other, a microplastics corrupted

our planet and our bodies. You can find him on Twitter at Miss Matt Simon, MR Matt Simon,

spelled just like it sounds. Let's start with microplastics, you know, the topic of your book.

Can you define terms for us and tell us why this should be a concern?

There are the agreed upon definition in the scientific community.

Microplastics are the little tiny bits that get below five millimeters.

And that is about the width of a pencil eraser.

So we're talking about plastic that you can still see with the naked eye,

but they of course get much, much smaller.

There are now studies on nanoplastics which are even scarier because they are down

at the micron scale, which they millionth of a meter.

So we know about plastic bags and plastic bottles.

These are the macroplastics.

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