Oil, out of Africa, is the hope of ERHC Energy (formerly Environmental Remediation Holding Corporation), an independent oil and gas company whose sole assets are two West African oil and gas exploration concessions: in the Joint Development Zone between the Sao Tome and Nigeria; and in the Exclusive Economic Zone in Sao Tome. ERHC is teaming up with larger oil and gas companies (such as Noble Energy and Pioneer Natural Resources) to help it develop its holdings. The company is also hoping to acquire interests in high-potential non-producing international prospects in known oil producing areas. Former chairman and CEO Emeka Offor, the owner of Chrome Oil Services and Chrome Energy, controls about 40% of ERHC.