1In the middle of the desert, rows of solar panels stretch toward the horizon.
2This solar farm produces enough electricity for eighty thousand homes each year.
3The panels follow the sun slowly, turning from east to west every day.
4Engineers chose this location because clouds are rare and sunshine is constant.
5Building the farm took three years and created hundreds of local jobs.
6Special robots clean the dust from the panels every night without water.
7Water is precious here, so the cleaning system uses soft brushes instead.
8The electricity travels through underground cables to cities hundreds of kilometers away.
9Unlike coal power stations, the farm releases no smoke or harmful gases.
10However, the desert heat reduces the panels' efficiency during the summer months.
11Engineers are testing new materials that work better in very high temperatures.
12Projects like this show that clean energy can replace fossil fuels completely.