The article mentions that microplastics are found at the bottom of the Mariana trench, but fails to mention that even plastic bags and candy wrappers have been found [1]. No need to look at Carbon-14 to find far reaching impacts of humans.<p>[1] <a href="https://www.bbc.com/news/science-environment-48230157" rel="nofollow">https://www.bbc.com/news/science-environment-48230157</a>
Well, really "scientists today have found carbon-14 and other radioactive traces of atomic testing pretty much everywhere they've looked..."<p><a href="https://www.knoxnews.com/story/news/2020/01/11/manhattan-project-atom-bombs-left-traces-earth-millions-years/2636998001/" rel="nofollow">https://www.knoxnews.com/story/news/2020/01/11/manhattan-pro...</a>