"I think the escalating trade war affects many, many things, including cooperation for clean energy projects," said Steven Chu, Nobel laureate and former US secretary of energy, on Saturday. Following the 10 percent tariffs on aluminum imposed in early June, the Trump administration is considering adding 10 to 25 percent tariffs on $200 billion worth of Chinese goods, including renewable energy products. The steel tariffs also are expected to affect development of wind and solar energy, which use more steel than any other form of energy generation. California now has 3 percent of renewable energy generated in use, and the number is expected to reach 50 percent by 2030. The country is also aiming to realize the maximum exploitation and utilization of renewable energy resources and high-efficiency energy utilization, he said.