Instead of relying on energy-hungry reactors to generate high temperatures and pressure, researchers are looking underground at Earth's natural heat and forces to cook up ammonia for fertilizer.

into rare earth concentrate, phosphoric acid - used in many fertilizers - and gypsum. "We see our first stage for phosphates at around 6% (of European demand) and rare earths about 2.5%," Darren ...

This includes nickel, copper, cobalt, manganese, zinc, gold and other rare-earth metals. Other mining operations target phosphates used as fertilizer in industrial agriculture. So far companies ...

into rare earth concentrate, phosphoric acid – used in many fertilizers – and gypsum. “We see our first stage for phosphates at around 6% (of European demand) and rare earths about 2.5% ...