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The company makes neodymium and praseodymium oxides—key components of magnets that often end up in high-tech products such as electric vehicles and F-35 fighter jets.

MP Materials produces neodymium and praseodymium oxides, key components of magnets for high-tech products like electric vehicles and F-35 fighter jets.

The advice says drinking water high in minerals is better for constipation than tap water, and magnesium oxide supplements are good for improving symptoms.

The dieselgate scandal first emerged in September 2015, when the US Environmental Protection Agency accused Volkswagen of installing software - known as "defeat devices" - on diesel cars to lower readings of the cars' nitrogen oxide emissions.

The company produces neodymium and praseodymium oxides, key components of magnets that end up in high-tech products, including EVs and F-35 fighter jets.