Renewables are reaching the point where they are outcompeting fossil fuels on price — setting the stage for their predicted dominance of the energy sector by midcentury. When it comes to the surging demand for new electric generation, wind and solar prices are now the cheapest options almost everywhere, according to the International Energy Agency (IEA). Building new wind and solar projects is also cheaper than running existing coal plants, according to a report from Energy Innovation, a nonpartisan climate policy think tank. The fall in price has led to a global rush to install new wind and solar —...