Metals and minerals industry

Retired coal miner John Robinson uses a nebulizer during his daily breathing treatments for black lung disease on Thursday, Jan. 24, 2019 in Coeburn, Va. Robinson was 47 when he was diagnosed with black lung disease, part of a new generation of black lung sufferers who are contracting the deadly disease at younger ages. (AP Photo/Dylan Lovan)

An island of solar panels floats in a pond at the Los Bronces mining plant, about 65 kilometers (approximately 40 miles) from Santiago, Chile, Thursday, March 14, 2019. The island of solar panels could give purpose to mine refuse in Chile by using them to generate clean energy and reduce water evaporation.(AP Photo / Esteban Felix)

In this Monday, March 4, 2019, photo, U.S. Secretary of State Mike Pompeo speaks to the Future Farmers of America and Johnston High School students in Johnston, Iowa. President Donald Trump’s willingness to engage in international trade fights has set off volleys of retaliatory tariffs that are driving down the price of pork, corn and soybeans in Iowa and elsewhere. Pompeo sought to calm some of those nerves Monday even as he warned that Chinese theft of technology affects agriculture, too. “The good news is this _ help is on the way,” Pompeo said. (AP Photo/Charlie Neibergall)

Rescuers load the body of a victim of a collapsed mine onto a truck in Bolaang Mongondow, North Sulawesi, Indonesia, Thursday, Feb. 28, 2019. Rescuers have passed water and food to some of the dozens of people trapped in a collapsed Indonesian gold mine, an official said Thursday, calling the gruelling rescue effort a race against time, in the remote inaccessible location. ((AP Photo/Harry Tri Atmojo)

Rescuers stand at the entrance of a collapsed mine in Bolaang Mongondow, North Sulawesi, Indonesia, Thursday, Feb. 28, 2019. Rescue workers used makeshift stretchers to haul victims of the gold mine collapse through steep jungle terrain to safety, as the death toll rose and dozens remained trapped in the debris. (AP Photo)

In this undated photo released by Indonesian Search And Rescue Agency (BASARNAS) rescuers evacuate a survivor from a collapsed gold mine in Bolaang Mongondow, North Sulawesi, Indonesia. The collapse of an unlicensed gold mine in Indonesia's North Sulawesi province has buried dozens of people, a disaster official said Wednesday, Feb. 27, 2019, as emergency personnel used their bare hands and farm tools in a desperate attempt to reach victims calling for help from beneath the rubble. (BASARNAS via AP)