Saint Mary's Currents
Saint Mary's Currents
Saint Mary's University of Minnesota
Micro and Nanoplastics with Peter Pfaff, Ph.D.
28 minutes Posted Sep 29, 2025 at 10:00 am.
Introduction of Topic and Guest Speaker Background
Micro and nanoplastics: What's the difference?
Sources of micro and nanoplastics in our daily lives
Environmental effects of micro and nanoplastics
Human consumption of microplastics and nanoplastics
Health risks
Approaches to removing microplastics from the environment
Reducing your plastic footprint
Promising new developments
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Show notes

From the cars we drive to the pre-packaged food we eat, the use of plastics in consumer's lives only continues to grow. It's showing up on our beaches and in our parks, but what about the plastics we can't see or can barely touch? According to a recent article from the New York Times, scientists say it could be years before we have a full understanding of how microplastics and nanoplastics are affecting human health. These tiny particles are turning up everywhere — from the deepest parts of the ocean to the food on our plates, and even inside our bodies.

The scale of micro and nanoplastic pollution has sparked serious questions about our health, our environment, and our future. So, what are these particles and where are they coming from? And what are the real-world consequences of their widespread presence on the environment and our health?