Sperm Therapy

Chemistry is not everyone's friend many are terrified seeing it's compound structure or formulas, and abstraction of elements is not an easy task and when the elements are rare earth elements (As defined by IUPAC, a rare earth element (REE) or rare earth metal is one of a set of seventeen chemical elements in the periodic table, specifically the fifteen lanthanides, as well as scandium and yttrium., and  as the name suggests they are very rarely available ) its quite expensive, technical, and not safe for environment,as damaging chemicals including Mercury and arsenic are used for extraction process.

These elements are very crucial in manufacturing of iPhone to turbines to hybrid cars and night vision goggles and many more. Europium is a phosphor that renders the red colour on the touch screens .The waste generated during extraction of these elements is harmful for the nature.
Researchers in Japan have come up with a more environmentally friendly solution for refining and recycling rare earth elements, so we can continue having smartphones and hard drives - salmon sperm.

The scientists, led by Yoshio Takahashi of Hiroshima University, found that several rare earth elements bound strongly to phosphate-containing molecules on the surface of bacterial cells, according to Chemistry World, a publication of the Royal Society of Chemistry. So they turned to salmon sperm, since it is largely made up of DNA, which contains a lot of phosphate. (And it’s also insoluble in water, unlike pure DNA, making it easier to work with.)
They found that the metals contained in neodymium magnets (including neodymium, dysprosium and trivalent iron) and several other rare earth elements bound strongly to DNA within dried and powdered salmon sperm. The metals were then recovered by adding acid to the solution and separating the various substances using a centrifuge, according to the PLOS ONE study where the team described their work.
However this is not a full proof method some acid is being used but it's quantity is reduced to the minimum and salmon sperm is easily availability Japan alone produces tons of salmon sperm as a waste material by its fish industry.