Recycling is the process of converting waste materials into new materials and objects. This concept often includes the recovery of energy from waste materials.

Utility Warehouse is a multi-service provider based in London, England that uses multi-level marketing to obtain customers through independent distributors. It is a brand name of its parent company, Telecom Plus.

Builders Warehouse (commonly referred to as Builders in South Africa), is a South African construction equipment and home improvement retail chain. Founded in 2003, it is owned by South African retail holding company Massmart.

Hybrid power are combinations between different technologies to produce power. In power engineering, the term 'hybrid' describes a combined power and energy storage system.

The economy of Houston is based primarily on the energy industry, particularly oil. However, health care, biomedical research, and aerospace also constitute large sectors.

Reliance Industries Limited is an Indian multinational conglomerate headquartered in Mumbai. Its businesses include energy, petrochemicals, natural gas, retail, entertainment, telecommunications, mass media, and textiles.

Repsol S.A. (Spanish pronunciation: [reβˈsol]) is a Spanish multinational energy and petrochemical company based in Madrid. It is engaged in worldwide upstream and downstream activities.

Scottish Power Limited, trading as ScottishPower, is a British vertically integrated energy company headquartered in Glasgow, Scotland. It is a subsidiary of Spanish utility firm Iberdrola.

Geothermal heating is the direct use of geothermal energy for some heating applications. Humans have taken advantage of geothermal heat this way since the Paleolithic era.

Geothermal power is electrical power generated from geothermal energy. Technologies in use include dry steam power stations, flash steam power stations and binary cycle power stations.