Ezimbonini ezinkulu zamandla ashisayo, amachweba okuthutha amalahle, izimayini zamalahle, izimayini, izinto zokwakha kanye nezinye izindawo ezidinga ukukhishwa kwensimbi ephezulu, futhi zingasebenza ngokujwayelekile ezindaweni ezinzima njengothuli, umswakama, nokugqwala kwesifutho sikasawoti esinamandla.Yisona esivame kakhulu indlela yokupholisa insimu ye-electromagnetic emhlabeni.