1. 1. United Nations. World urbanization prospects: the 2014 revision, highlights. Department of Economic and Social Affairs; 2014. https://doi.org/10.4054/DemRes.2005.12.9.
2. 2. Olympios, C.M., 1999. Overview of soilless culture: advantages, constraints and perspectives for its use in Mediterranean countries. Cah. Options Méditerranéennes 31, 307-324.
3. 3. Hussain, A., Iqbal, K., Aziem, S., Mahato, P., Negi, A.K., 2014. A review on the science of growing crops without soil (soilless culture) - a novel alternative for growing crops. Int. J. Agric. Crop Sci. 2227
4. 4. Sheikh, B.A., 2006. Hydroponics: key to sustain agriculture in water stressed and urban environment. Pakistan J. Agric. Agric. Eng. Vet. Sci. 22, 53-57.
5. 5. Hussain, A., Iqbal, K., Aziem, S., Mahato, P., Negi, A.K., 2014. A review on the science of growing crops without soil (soilless culture) - a novel alternative for growing crops. Int. J. Agric. Crop Sci. 2227.