The construction sector has a key role to play in greenhouse gas (GHG) emissions reductions. Not only can firms in the sector, by using less energy-intensive and polluting strategies and techniques, contribute to this reduction, these firms can also encourage clients to utilize such technologies. The construction sector encompasses a range of segments; the building sector with primary building work demolitions, maintenance, repairs and alterations and heavy construction work. Typically, however, the construction sector is seen as encompassing residential building (houses and residential property), non-residential building (industrial buildings) and civil works (or civil engineering). As noted in the economic sector review of the construction industry, the building sector dominates. This segment accounted for 62.5% of all construction activities in value terms in 2009.