In part one, we're exploring the issues with plastics in marine environments, trying to figure out what's going on with microplastics and even diving into a little chemistry when we look at the new links that scientists have uncovered between plastics and our health. 
Once you've finished this episode, head over to enjoy part two. We'll be looking at some of the things that we can do to reduce our plastic footprint. Plus, we'll be chatting to Libby Bowles, who cycled around the world on a bamboo bicycle to teach kids about plastics.
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Theme music and sound mixed by Mark Skinner.