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Class subject: World copper production by country.
Copper is a soft, malleable, and ductile metal with very high thermal and electrical conductivity. A freshly exposed surface of pure copper has a reddish-orange color. It is produced in massive stars and is present in the Earth's crust in a proportion of about 50 parts per million (ppm). The largest mass of elemental copper discovered weighed 420 tonnes and was found in 1857 on the Keweenaw Peninsula in Michigan, US. Most copper is mined or extracted as copper sulfides from large open pit mines in porphyry copper deposits that contain 0.4 to 1.0% copper. The following is a List of countries by copper production for 2016 from Wikipedia.
Thousand tonnes per year
1 Chile 5,760
2 China 1,710
3 Peru 1,700
4 United States 1,380
5 Congo (DRC) 1,020
6 Australia 971
7 Russia 732
8 Zambia 712
9 Canada 697
10 Mexico 594
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