The global steel industry has been going through major changes since 1970. China has emerged as a major producer and consumer, and India has, to a lesser extent. Consolidation has been rapid in Europe. According to the 2019 International Energy Agency (IEA) report, the iron and steel industry directly contributed 2.6 Gt to global CO2 emissions and accounted for 7% of global energy demand. Singapore is the world's main trading hub for iron, with about 90% of the world's iron ore derivatives traded on their stock exchange.