1. Abu-Hamatteh, S. H., Al-Jufout, Saleh2, Abbassi, B. and Besieso, M. S. 2010. “Biogas Energy: Unexplored Source of a Renewable Energy in Jordan”. International Conference on Renewable Energies and Power Quality (ICREPQ'10). 23rd to 25th March2010, Granada, Spain.
2. Solar ponds