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

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.

Cimerwa Cement Limited (CCL) is a manufacturer of cement in Rwanda with capacity of approximately 600,000 tonnes per year.

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.

This is the list of companies that manufacture cement in Zimbabwe.

Fox ESS Co., Ltd. (Chinese: 麦田能源股份有限公司), trading as Fox ESS, is a Chinese manufacturer of photovoltaic inverters and battery energy storage systems headquartered in Wenzhou, Zhejiang.