If you look around the world, the countries with the best environmental practices are the wealthiest. There's a reason for that. If you're worried about where your next meal is going to come from or shelter over your head, your focus is on those things.

Natural gas will displace coal in power generation. Getting natural gas into the transportation fleet is harder. It works best for vehicles that work from centralized fueling facilities like trucking fleets or buses and cabs. That is happening. Before it can make big inroads beyond that, infrastructure is going to need to be developed.

What I see are people who want affordable energy. They want strong environmental standards - they want a lot of things - but first and foremost they want affordable energy. And if you want affordable energy, you want oil, gas and coal.

Chinese growth will either be strong or very strong. They have a voracious demand for energy that will only continue to grow. What they're doing... is looking at all forms of energy. They're going ahead very strongly with coal, nuclear, oil, natural gas.

Historically, the United States has had a wonderful energy policy. We're blessed with a diversity of resources. We have oil. We have gas. We have coal. We have nuclear. And renewables. And as a result, one of our biggest competitive advantages has been affordable energy. You need a strong economy and you need affordable energy to fuel that economy.

Actually, I'm a strong supporter of comprehensive tax reform.

Price creates incentive, and energy will be developed if there's demand for it at the price you can develop it.