Sempra Generation believes in solar power’s bright future: The dust had barely settled at the company’s five-month-old 10-MW photovoltaic power generation plant near Boulder City, Nev., when it announced an expansion to quintuple capacity. The company claims it will create North America’s largest thin-film photovoltaic installation. Photo: First Solar Solar plant is next to Sempra’s 480-MW gas-turbine plant. The unit of San Diego-based Sempra Energy “won’t start construction until we have a [power sales] contract in hand,” says a Sempra spokesman. “We hope to start construction later this year.” Potential buyers could come from neighboring states, all of which have
The 2016 Summer Olympics boating and swimming events have put an international spotlight on what has been a long-running problem in Rio de Janeiro—untreated sewage and trash are clogging up major bays and waterways.