Seawater Greenhouses use sunlight, wind and seawater to grow crops in arid coastal environments. Climate change and desertification are leading to rapidly declining amounts of arable land and water for agriculture, particularly in Africa. Existing practices of irrigation exacerbate the problem by over-abstracting groundwater and the resultant desertification greatly reduces an ecosystem’s ability to sequester carbon. Seawater Greenhouses are ‘cool houses’ designed to overcome this problem in arid coastal environments by evaporating seawater, to create a cool and humid microclimate, ideal for crop cultivation. This reduces the demand for fresh water by crops inside the greenhouse by up to 90%.