I think that one of our most difficult international challenges is clearly climate change and making sure that the Paris agreement goes forward. While I think the international community understands that President Trump is not taking the same position as President Obama.

Any first-generation technology will. But we are looking at carbon the same way we look at every pollutant under the Clean Air Act; we look for the new technologies that are available. We recognize that these power plants are going to be around for decades.

When consumers do not take full advantage of efficiency gains, it is because they are weighing other factors that influence their decision making. When the federal government arbitrarily places one of those factors over others, it makes consumers worse off.

People are not running to build coal facilities because of the price of natural gas, but we do see them being constructed, and there is an interest in fuel diversity, so we took the exercise pretty seriously.

There is no threshold level of fine particle pollution below which health risk reductions are not achieved by reduced exposure.

Proponents of efficiency standards argue that they save consumers and businesses money, reduce energy use, and reduce emissions. But families and businesses already understand how energy costs impact their lives and make decisions accordingly.

I love disagreements. I love the democratic process. If I'm in a room where everybody agrees, I start to nod off.