Sustainable energy development and environment -- Demand for energy efficient, eco-friendly environment, applications and sustainable development -- Groundwater potential and sustainable management in the Nile Valley : an overview -- Ground source heat pump system for energy efficient, refrigeration and air conditioning -- Cooling and heating with ground source energy -- Review of energy resources and challenges of Sudan: past, present and future -- Development of green energy saving mechanisms -- Comprehesive review of bioheat from agriculture wastes, sutsainabe development and environment -- Promotion and implementation of bioenergy for a better environment : a mini review -- Sustainable water resources management, future demands and adaptation strategies in Sudan -- The green ecology, economics and ecosystem engineering -- Renewable energy technologies, sustainable development and environment.