Millions of people in Ecuador were left without electricity for hours in a nationwide power outage in the South American country. “It was a chain reaction,” Public Works Minister Roberto Luque, who is also serving as the country’s acting energy minister, was quoted as saying in a Wednesday post on X. The failure of some power plants had created a “black out” effect, he said. “The demand for energy was suddenly greater than the supply, which led to the collapse of the national power grid,” Luque explained. The blackout occurred at about 3:20 pm local time (2020 GMT), the minister said. Electric…