Renewable, clean energy sources.
"Sustainability represents societal efforts to meet the needs of the present without compromising the ability of future generations to meet their own needs." - President's Committee on Sustainability
"The Barnett Shale, a natural gas-bearing formation underneath 21 counties in north Texas, is a wildcatter's dream: Wherever energy companies poke a hole, there's gas. Now they're scrambling to drill anywhere there's vacant land — at country clubs, parking lots, city parks, school grounds and airports.
But a vocal and growing minority is not getting behind the Barnett Shale, even though Texas-born actor Tommy Lee Jones urges them to on recent billboards and in newspaper and television ads. Jones is a corporate spokesman for Chesapeake Energy, the nation's largest independent producer of natural gas."
--"Urban Gas Drilling Causes Backlash In Boomtown," National Public Radio's All Things Considered, 5 August 2008