The future of farming in much of the world could look like something out of science fiction. Sundrop farms in Australia has a farm up and running that produces food using seawater pumped into a desert location where they use the power of the sun to power the entire process. Solar energy desalinates the water while purifying the environment (so no pesticides) of the greenhouse – the entire process is form renewable sources!
Seawater is piped 2 kilometres from the Spencer Gulf to Sundrop Farm â€“ the 20-hectare site in the arid Port Augusta region. A solar-powered desalination plant removes the salt, creating enough fresh water to irrigate 180,000 tomato plants inside the greenhouse.
Scorching summer temperatures and dry conditions make the region unsuitable for conventional farming, but the greenhouse is lined with seawater-soaked cardboard to keep the plants cool enough to stay healthy. In winter, solar heating keeps the greenhouse warm.
There is no need for pesticides as seawater cleans and sterilises the air, and plants grow in coconut husks instead of soil.
The farmâ€™s solar power is generated by 23,000 mirrors that reflect sunlight towards a 115-metre high receiver tower. On a sunny day, up to 39 megawatts of energy can be produced â€“ enough to power the desalination plant and supply the greenhouseâ€™s electricity needs.