Climate Central: On the outskirts of downtown St. Paul, Minn., Xcel Energy's High Bridge Generating Station offers an iconic view of the current state of electrical generation in the United States. Opened in 2008 as a replacement for an aging coal plant, the 534-megawatt natural gas facility looms over three solar photovoltaic panels that provide a sculptural element to the site in addition to 9.8 kilowatts of electricity.
Both natural gas and PV have compelling attributes in an age where concerns over climate...