LONDON (Reuters) - The world faces a potential energy supply squeeze as economic growth rebounds, offering huge investment opportunities in the oil and gas industry and in other energy companies, a fund manager said on Thursday.

Christopher Wheaton, who runs two energy industry-focused funds for Allianz Global Investors, the asset management arm of insurance giant Allianz (ALVG.DE), told Reuters the growth in demand for energy, particularly oil, and supply constraints would make many energy companies increasingly profitable.

Wheaton recommends investors concentrate on three key areas in the energy industry, all of which are likely to benefit from a scramble to meet escalating fuel consumption in the developing world, particularly in Asian and Latin America.