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As a magnesium alloy, a small quantity of thorium can be used for its. hardening and lightweight properties, making it ideal for the aerospace industry.1 One problem. with thorium is its mildly radioactive nature, producing concerns over its safety and potential. harmful effects.
What is helium used for? Today, helium plays a prominent role in medical imaging (magnetic resonance imaging), fiber optics/semiconductor manufacturing, laser welding, leak detection, superconductivity development, aerospace, defense, and energy programs. Is helium renewable (does it naturally replenish itself after humans use it)? No, helium is a non-renewable resource.