<h1>Eight Core Industries Index Rises 3.1% in July 2013; Steel and Refinery Products Lead Growth.</h1> The Index of Eight Core Industries, which contributes 37.90% to the Index of Industrial Production, increased by 3.1% in July 2013 compared to July 2012. Key sector performances include coal production rising by 1.2%, crude oil declining by 2.3%, and natural gas dropping by 16.1%. Petroleum refinery products grew by 5.1%, fertilizers by 0.4%, steel by 7.0%, cement by 0.8%, and electricity generation increased by 5.2%. The cumulative growth from April to July 2013-14 showed varied trends, with notable declines in crude oil and natural gas production, while refinery products and steel saw positive growth.