NYT: Earlier this summer, Prime Minister Wen Jiabao of China promised to use an “iron hand” to improve his country’s energy efficiency, and a growing number of businesses are now discovering that it feels like a fist. The Ministry of Industry and Information Technology quietly published a list late Sunday of 2,087 steel mills, cement works and other energy-intensive factories required to close by Sept. 30. Energy analysts described it as a significant step toward the country’s …