The Energy Information Administration (EIA) puts it at around 37tcm of recoverable reserves, two-thirds of which is shale gas and the rest tight gas and coal-bed methane.
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The original Zeppelins were based on a rigid design in which separate gas-tight compartments were surrounded by a metal frame covered with a non-airtight fabric.
Fracking is a vital contributor to the recent renaissance in the U.S. oil and natural gas supply picture, as it is the technology, along with horizontal drilling, that makes producing oil and natural gas from very tight shale rock formations possible.
Hydraulic fracturing pumps many thousands of gallons of mainly water and sand, with a few chemicals, at high pressure into tight gas-bearing shale deposits (hardened muds), creating cracks that allow gas to flow back up the well to the surface ( Shale Shock).
But until the new facilities are up and running, gas supplies will be tight.
Used fuel that has been cooled in a spent fuel pool for at least five years can be put into a container called a cask and surrounded with inert gas, providing leak-tight containment, according to the U.S. Nuclear Regulatory Commission.
Fracking, of course, is the controversial method by which producers extract tight oil and gas a process that uses a concoction of water, sand and chemicals to break those deposits free from the rocks where they rest a mile beneath the ground.
Its profits aren't expected to be as strong next quarter because of the seasonal demand for natural gas and softer crude oil prices, but analysts say oil and gas price fluctuations will not be drastic because of tight supply and strong demand.
Every well that gets drilled into shale formations or other tight reservoirs requires hydraulic fracturing before the oil and gas will flow.
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Still, while rising demand for oil should be a cause of concern long-term, economists say the current spike in U.S. gas prices is just that--a spike caused by unusually tight supply.
Surgutneftegaz, (an oil company thought to be tight with the Kremlin), and Gazprom (a state-controlled gas leviathan) have been among his targets.
Busy moms and families on tight budgets are increasingly using mobile technology to coordinate shopping trips to save on gas and eliminate extraneous purchases.
Russia is far happier sitting tight and pushing the idea that mothballing upstream investments will reduce volumes in order to put gas prices firmly back on oil indexed fundamentals.
For example, a car could gently increase the gas-pedal spring pressure when the speed is too high -- the navigation system knows how tight that upcoming curve is, remember -- or apply a light twist to the steering wheel if the car is drifting off course.
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In 2009, the El Dorado Task Force, a joint federal and state law enforcement effort focused on money laundering and other financial crimes, built an air-tight case against nearly a dozen Con Edison employees for taking kickbacks from contractors that performed gas line and electrical work for Con Edison on construction projects in New York City and Westchester County.
My budget became so tight that I felt each expense keenly: The regular bills, the rising costs of food, gas, and doctor co-pays.
By the 1980s the state gas sector that ran the operation was controlled by a classic Soviet functionary, Victor Chernomyrdin, and he held on tight to his post until 1992, a year after Boris Yeltsin became the first popularly elected leader of Russia.
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