As for the security of supply, this also gets a check. Almost all our natural gas and coal are domestically produced. And we export both. Since US demand for power is rising, with natural gas the fuel of choice for a generation, the main risk to long-term affordability is the eventual depletion of our principal gas fields. Also, the US sits atop a roughly three-hundred-year supply of coal if the industry chooses to heed the latest admonitions from the Trump administration with respect to “clean, beautiful coal.” In short, the US, unlike many nations, can remain energy self-reliant for the foreseeable future.