Secondary sector of the economy

The secondary sector of the economy includes industries that produce a finished, usable product or are involved in construction.The twenty largest countries by industrial output (in PPP terms) at peak level as of 2018, according to the IMF and CIA World Factbook. The secondary sector of the economy includes industries that produce a finished, usable product or are involved in construction. This sector generally takes the output of the primary sector and manufactures finished goods or where they are suitable for use by other businesses, for export, or sale to domestic consumers. This sector is often divided into light industry and heavy industry. Many of these industries consume large quantities of energy and require factories and machinery to convert raw materials into goods and products. They also produce waste materials and waste heat that may cause environmental problems or cause pollution. The secondary sector supports both the primary and tertiary sector.