The growth momentum of renewable energy is gratifying
In 2015, wind and solar power accounted for 23% of the world's total electricity generation. With the increase of wind power and solar power production capacity, the proportion is expected to rise to 30% by 2020.
Demand for renewable energy has remained high throughout the world. From wind turbines to solar panels, copper is a key component of renewable energy technologies. Wind turbines use copper as grounding material, transmission cables, transformers, frequency converters, surge protectors, and parts of their generators and control systems.  Only one wind power plant will use 4 million pounds (1800 tons) to 15 million pounds (6,800 tons) of copper.