These are not the lava-spewing kind, but vents from which the earth emits small amounts of gas and mud.
Those fissures and crevices that have trapped natural gas below the Earth's surface are also capable of trapping helium, although typically in small amounts.
Today, at the dawn of a new century, we had the opportunity to forge a widening international commitment to begin banishing poison gas from the earth, even as we know it remains a grave, grave threat in the hands of rogue states or terrorist groups.
In the early days of oil and gas exploration, geologists would largely rely upon topology at the surface of the earth to interpret the location of oil and gas accumulations in the subsurface.
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From offshore oil to previously inaccessible gas deep in the earth, the federal domain is poised for an energy renaissance.
That level of production would make Texas the 3rd largest natural gas producing nation on earth, behind only Russia and the other 49 US states.
On the plus side, the ability to directly detect light from a planet closer to the size of Earth than a Jupiter-sized gas giant is a positive step forward in our ability to learn more about planets that might be habitable.
We've added enough new oil and gas pipeline to circle the Earth and then some.
Oil and gas this deep in the earth is often as hot as 450 degrees and at pressures 2, 000 times atmospheric.
It coincided with the release of a report commissioned by Cuadrilla which found it was "highly probable" that shale gas test drilling triggered two earth tremors near Blackpool.
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From copper to gold, from oil to natural gas, prices for the earth's riches have skyrocketed in the past few years as emerging markets added vast demand and speculators revved up markets in ways never seen before.
Friends of the Earth said "a green light for shale gas would be a costly mistake for our country and countryside".
Today is Earth Day, and it is very likely that the fact that abundant fossil fuels like oil, natural gas and coal, are natural resources, and gifts to humanity from Mother Earth herself will be lost amid all the frightful doom and gloom predictions that will be launched by environmental activists and repeated by various media outlets.
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But those lower-energy X-rays can be further distorted by layers of gas between the black hole and the Earth, and previous spin observations have been contentious.
According to a report released by the Wood Mackenzie firm in early January, Eagle Ford is now the largest oil and gas development on the face of the earth based on total capital expenditures.
Fracking involves injecting water, sand and some chemicals deep into the earth to crack shale rock, which frees oil and gas.
Greenhouse gases still warm planets, carbon dioxide is still a greenhouse gas and the amount of it in the Earth's atmosphere is still shooting up.
If Texas were a stand-alone country, it would today rank as the 14th largest oil producing nation and 3rd largest natural gas producing nation on the face of the earth.
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On its route to earth, light from some quasars passed through a cloud of gas.
The three conventional forms of fossil carbon oil, coal and gas differ both in the way the Earth stores them and the way its people use them.
Nitrous oxide is also considered a greenhouse gas and is 310 times more dangerous to the Earth's ozone layer than carbon dioxide, said Joseph Johns, chief of the U.S. attorney's environmental crimes section.
There was a ripple of fear in Britain when test-drilling for shale gas in north-west England set off small earth tremors, but the evidence so far suggests that earthquakes should not be a worry.
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And soon a dictator who had used poison gas on his own people was found cowering in the earth.
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"They're making a product that's bad for life on earth, they've brainwashed us into thinking that we want gas-guzzling trucks and SUVs and now it's like their karma is hitting them in the face, " she said.
The visible light from it was bright enough for George Djorgovski, Mark Metzger and Shri Kulkarni of the California Institute of Technology and their colleagues to analyse, and to demonstrate that it had travelled through a cloud of interstellar gas at least 10 billion light-years from the earth.
We remember the poison gas, the moonscape of shattered trees and churned-up earth, the incompetent leadership that could imagine no way of conducting the war other than repeated frontal attacks.
For more than six decades, gas companies have been using advanced technologies to hydraulically fracture and safely procure natural gas from up to two miles beneath the surface of the earth.
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The president would oversee bi-partisan legislation to limit carbon dioxide -- the main "greenhouse gas" blamed by many scientists for trapping heat in the earth's atmosphere -- from U.S. power plants for the first time, she said.
And Andy Atkins, executive director at Friends of the Earth, which backed the letter, said Mr Osborne's support for gas power was looking "increasingly isolated".
There, the so-called greenhouse gas absorbs infrared radiation, and then sends some of that radiation to earth.
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