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Construction covers the processes involved in delivering buildings, infrastructure, industrial facilities and associated activities through to the end of their life. It typically starts with planning, financing, and design, and continues until the asset is built and ready for use; construction also covers repairs and maintenance work, any works to expand, extend and improve the asset, and its eventual demolition, dismantling or decommissioning. The construction industry contributes significantly to many countries’ gross domestic products (GDP). Global expenditure on construction activities was about $4 trillion in 2012. Today, expenditure on the construction industry exceeds $11 trillion a year, equivalent to about 13 percent of global GDP. This spending was forecast to rise to around $14. 8 trillion in 2030. Broadly, there are three sectors of construction: buildings, infrastructure and industrial Building construction is usually further divided into residential and non-residential. Infrastructure, also called heavy civil or heavy engineering, includes large public works, dams, bridges, highways, railways, water or wastewater and utility distribution. Industrial construction includes offshore construction (mainly of energy installations), mining and quarrying, refineries, chemical processing, power generation, mills and manufacturing plants. Infrastructure is the set of fundamental facilities and systems that support the sustainable functionality of households and firms. Serving a country, city, or other area, including the services and facilities necessary for its economy to function. Infrastructure is composed of public and private physical structures such as roads, railways, bridges, tunnels, water supply, sewers, electrical grids, and telecommunications. In general, infrastructure has been defined as "the physical components of interrelated systems providing commodities and services essential to enable, sustain, or enhance societal living conditions" and maintain the surrounding environment. internal facilities of a country that make business activity possible, such as communication, transportation and distribution networks, financial institutions and markets, and energy supply systems".
Melanesia is a subregion of Oceania in the southwestern Pacific Ocean. It extends from New Guinea in the west to Tonga in the east, and includes the Arafura Sea and a few thousand islands. The region includes the four independent countries of Fiji, Vanuatu, the Solomon Islands, and Papua New Guinea. It also includes the French colonial collectivity of New Caledonia and parts of Indonesia – notably the provinces of Papua and West Papua. Almost all of the region is in the Southern Hemisphere; only a few small islands that aren't politically considered part of Oceania—specifically the north western islands of Western New Guinea—lie in the Northern Hemisphere. Countries in Melanesia - Fiji, Vanuatu, the Solomon Islands, Papua New Guinea, New Caledonia.