Global spending on renewable energy is outpacing investment in electricity from coal, natural gas and nuclear power plants, driven by falling costs of producing wind and solar power. More than half of the power-generating capacity added around the world in recent years has been in renewable sources such as wind and solar, according to the International Energy Agency. In 2016, the latest year for which data is available, about $297 billion was spent on renewables—more than twice the $143 billion spent on new nuclear, coal, gas and fuel oil power plants, according to the IEA. The Paris-based organization projects renewables will make up 56% of net generating capacity added through 2025. Once supported overwhelmingly by cash-back incentives, tax credits and other government incentives, wind- and solar-generation costs have fallen consistently for a decade, making renewable-power investment more competitive. Renewable costs have fallen so far in the past few years […]