In a few years shale gas's share of America's total gas output has gone from almost nothing to around a fifth.
The unconventional-gas bonanza has roughly doubled the gas resource base, a measure of the total gas in the ground rather than what might be economically recoverable.
In the Dallas-Fort Worth area, as total gas production in 2009 increased by 94 percent from 2000 levels, the levels of ground level ozone fell by nearly 15 percent.
International regions represent 38% of its total gas volumes.
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The total natural gas production from this play was around 10% of the total production of 834.8 bcf in 2009.
In the case of the Siberian gas pipeline project, Moscow was well aware of the inordinate West European dependency on Soviet natural gas supplies -- ultimately projected to exceed 60% of total European gas consumption -- which would have resulted from the successful completion of both strands of the twin 3, 600-mile pipelines connected to the West European gas grid.
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The federal share of total natural gas production in 2007 was 27.8%.
In California, for instance, CO2 accounts for a much bigger share of total greenhouse gas (GHG) emissions (76%) than the global average (56%).
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In 2009, the Barnett shale play was the most prolific play, accounting for almost 62 percent of the total shale gas production, says KPMG Consulting.
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According to the US Energy Information Administration, the Chinese government has targeted to produce 8% to 12% of total natural gas production from shale gas by 2020.
At times of peak demand, electricity is made largely from natural gas in turbines so inefficient that saving 1% of U.S. electricity, including peak hours, saves 2% of total natural gas use and cuts its price 3% to 4%.
For example, if one adds up the wet-gas production from all the shale-gas plays, the answer would be far in excess of the total dry-gas production nationwide.
Shell said total oil and gas production grew to 3.559 million barrels of oil equivalent per day in the first quarter, from 3.552 million in the same period in 2012.
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However, BP said that total oil and gas production was down 5% on a year earlier, primarily due to the sale of its stake in the TNK-BP Russian joint venture.
Over the last few years, the annual number of miles driven by Americans has stayed roughly the same, but the total amount of gas we use has been going down.
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Its analysis shows that the total cost of gas, electricity and labor in making transportation equipment and machinery in the U.S. now beats the cost in Germany, France, Italy, the U.K. and Japan.
Existing techniques and technologies in energy efficiency retrofitting can reduce energy use by up to 40 percent per home and lower total associated greenhouse gas emissions by up to 160 million metric tons annually.
The Soviet shares of total oil and gas consumption respectively should be limited to about 30%, mirroring the intent of the International Energy Agency Agreement of May 1983 pertaining to West European dependency on Soviet gas supplies.
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Though the total amount of gas hydrates possibly recoverable is not yet known, it seems safe to assume it is sufficiently large that exploiting it in its entirety would throw the climate deeply out of the safe zone, even if no other fossil fuels are burnt.
Pakistan led the list in 2010 with 2.7 million natural gas vehicles, though many are tiny tuk-tuks, out of a total of 13 million natural gas vehicles worldwide.
Wood Group's largest division has secured a major North Sea contract extension with oil and gas giant Total.
But developing countries have no incentive to stop cutting down their forests, and tropical deforestation accounts for around 20% of total annual greenhouse-gas emissions.
"To have 100 billion cars on the planet that aren't being used is a total waste of materials, gas, petrol, metals, " Frigstad explained.
Despite this looming deficit and the glaring price signal, all the big companies except Total produced less oil and gas in the third quarter than they did in the same period last year.
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Various factors influence this relationship such as the availability of cheaper substitutes like coal and natural gas as well as total refining capacity.
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The stakes could not be higher: Production from shale formations has grown from a negligible amount just a few years ago to almost 15 percent of total U.S. natural gas production.
Consider: Production from shale formations has grown from a negligible amount just a few years ago to almost 15 percent of total U.S. natural gas production and this share is expected to triple in the coming decades.
That would be enough to satisfy total U.S. oil and gas demand for four and three years, respectively.
It was probably a good deal for Total also, considering that low natural gas prices have made drilling in the Barnett barely economic.
In the UK, during 2012, electricity generation from coal-fired power stations actually increased to almost 40% of total production, as the price of gas soared, and gas-fired electricity generation was reduced.
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