Key quotes from the Reuters Energy Summit

Top executives from the worlds of oil, gas and coal opened the Reuters Energy Summit on Monday with a range of comments on the economy, their assets and the states of their industries.

Below are a few select comments from those executives:

“At present I’m not real robust on the U.S. economy” — Steven Farris, chief executive of Apache Corp. (APA.N: Quote, Profile, Research) “The current prices of oil and gas are pretty tough on this economy.”

“The railroads keep me up at night.” — Arch Coal Inc. (ACI.N: Quote, Profile, Research) president and chief executive Steven Leer.