Some claim that oil producers are in effect hoarding oil below the ground.
In the 13th century a great Icelandic bard, Snorri Sturluson, wrote of dark elves who live in caves below the ground.
These include increasing difficulties of mining far below the ground in the key producing nation of South Africa, as well as labor issues that mean higher costs and the threat of supply disruptions due to strikes.
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But now, following the restoration, then closure due to floods and reopening earlier this year of the below ground hypogeum and the very top tier of the arena, visitors can get the view from a totally different perspective and without the crowds.
Alex Scott, SNH area officer for West Sutherland and Wester Ross (North), said the caves provided a unique record of Scotland's ancient history, as glaciers during the Ice Age erased many remains buried just below the surface of the ground.
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We have 191 million buildings in the EU. The mission now is to convert the entire building stock of Europe to partial green power plants that can collect solar energy on the roofs, wind energy off the sides of the building, geothermal energy from the ground below the building, biomass energy from the conversion of garbage in the building, etc.
The gates which were used at the Copperhouses pool sluice were found below ground behind the Hayle Harbour Office.
Kobel says between 500 and 700 people are working on the project at any time, building below ground while the old station continues to function above.
But in the Southwest, where the frost line is only about 18 inches below ground, the added incremental cost of digging out a basement would be far steeper, said the Texan.
Two teams of engineers, one funded by the state of Louisiana and one based at the University of California, Berkley, have previously put the blame on the Army Corps of Engineers and on a weak layer of ground below the canal walls.
Please read the update below for clarification on Ground Zeroes and The Phantom Pain.
The Fly Delta app for iPad features a "Glass Bottom Jet, " through which customers will have the ability to view the ground below in a unique way that includes maps, social networks and internet content while connected to the Internet on any of Delta's more than 800 Wi-Fi-equipped aircraft.
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The ground below 150 metres (500 feet) deep is said to contain much less arsenic.
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In the afternoon we watched soldiers playing hide and go seek with children on the ground below.
People on the ground below will never see the spontaneous private thoughts high in the Manhattan sky.
You realise are you standing on a metal grid and you can look through to the ground below.
And an area on the ground below the table is kept clear in case a diner drops a fork.
Whether it's for the love of the arts, a penchant for public ridicule or a closer whiff of the ground below, we can't say for sure.
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Believing that the ground below the twin towers is as sacred as the space above, some even say that the new transport hub must be moved northwards.
They are light enough to be launched by hand and will be able to take images of the ground below with a still or video camera, they add.
Located about 25 miles below ground, the quake triggered brief tsunami warnings for the rest of Central America, Peru, Colombia, and Panama, but no waves or surges resulted.
Fay and pilot Peter Ragg followed a general map of the "human footprint" on the continent while automatic cameras snapped a photo of the ground below every 20 seconds.
Chambers recently invited me below ground at the Brompton Road Tube station in West London, which he intends to turn into a restaurant and museum in time for the 2012 Olympics.
Every new military technology that came along, from stealthy airframes to smart bombs to digital data links, seemed to demonstrate that future wars would be won in the skies above rather than on the ground below.
The company has had to raise capital in order to invest in pulling that oil out of the ground, thousands of feet below the surface of the ocean, and another thousand feet below rock and sand.
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The technique they developed, called hydraulic fracking, involves drilling 5, 000-9, 000 feet below ground (in the Marcellus shale), and then moving horizontally into the layers of shale rock where the hydrocarbons lie.
The options for shelters are many: above-ground, below-ground, mounted in the garage, on the patio, on a poured slab or even in a space carved out beneath the slab.
Several vehicles were reported to have fallen to the ground 30m below.
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