China is the world's largest consumer of most commodities

From Bank of America Merrill Lynch's Research Investment Committee:

China is both the largest producer and largest consumer of aluminum and iron ore, and the largest consumer of most other commodities (around 40-50% of copper; Chart 4). In the past 10 years, commodity demand growth in China represented between 50% and 100% of global consumption increases across most major commodity markets.

Bank of America Merrill Lynch