On December 8, 2007, the federal Department of the Environment announced that facilities in the following industrial sectors are required to report certain information regarding designated air pollutants, greenhouse gases and other substances for the 2006 calendar year: alumina and aluminum; base metal smelting; cement; chemicals manufacturing; electricity; iron, steel and ilmenite smelting; iron ore pellets; lime; natural gas transmission, distribution and storage; oil sands; petroleum product terminals; petroleum refining; potash; pulp and paper; and upstream oil and gas. Facilities may be required to report on a variety of substances, including carbon dioxide, methane, nitrous oxide, sulphur dioxide, benzene, dioxins, mercury, polycyclic aromatic hydrocarbons and particulate matter. Reports must be submitted by May 31, 2008. For more information, please see  canadagazette.gc.ca/partI/2007/20071208/pdf/g1-14149.pdf.