The world cannot seem to get enough copper. This metal is mined in places as disparate as China, the Democratic Republic of Congo and Utah.

Copper prices have risen around 10% since the start of this year, in part because the metal is crucial to renewable energy technology and the transition away from fossil fuels.

Copper is often referred to as “Dr. Copper,” because it’s considered a barometer for the health of the global economy.

Traders like to play off that saying, according to Bobby Iaccino, co-founder of Path Trading Partners.

“They say copper has a Ph.D. in economics,” he said. “That still doesn’t really explain it, OK? Anywhere where there’s electricity, there’s copper usage.”

Demand for copper is especially high now as the market for renewable energy expands, said Michael Klare, a professor emeritus at Hampshire College.

“You’re going to need a lot more copper for wiring to connect various sources of renewable energy — wind farms and solar farms — to wherever you’re going to use the renewable energy,” Klare said.

And in electric vehicles, the amount of copper needed can be more than double what’s used to make traditional gas-powered vehicles.

This year’s surge in copper prices is in part due to China and its emergence from pandemic-related shutdowns, said Rohan Reddy, director of research at Global X ETFs.

“China makes up about half of all global copper demand. There’s a saying, ‘As China goes, so does copper,'” Reddy said.

That’s the other copper adage you’ll hear a lot — and one that seems to be holding true. The question now is what happens next in China, said Bart Melek, global head of commodity strategy for TD Securities.

“We continue to see a very significant amount of infections in that country,” Melek said. “And that is something that will take time to work its way through.”

That’s why Melek’s call on copper for the coming months is relatively cautious. Rising interest rates, a potential global economic slowdown — all of it, he said, could take the shine off of copper demand.