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Castillo hopes that his research will help uncover the potential impacts microplastics are having to human health and that it will help spur changes to how society produces and filtrates plastics.

The stalactites - hundreds of mineral formations hanging like melted candle wax above us which naturally filtrate the rainwater - are being clogged by cement dust, he says.

When he appeared, he launched into a lecture about cleaning up filtrate at the landfill site.

“There is no ideal solution. We have to trust that the Navy will filtrate the water properly,” Swanson said.

The product was recovered from the filtrate by using rotary evaporation.