As of 2018, the USGS reported that the total copper contained in world reserves was approximately 790 million tons.
According to the USGS, how much total copper was contained in world reserves as of 2018?(1 point)
Responses
790 millions tons
790 millions tons
300 million tons
300 million tons
5 million tons
5 million tons
45 million tons
45 million tons
1 answer