It produces less carbon dioxide for a unit of energy than coal or oil, so the climate will benefit to the degree that gas replaces either of those: it will mostly substitute for coal, though some oil too, especially if gas-powered trucking becomes widespread.
For their calculations, the two assumed that where there was a gap between demand and conventional supply it would be filled with synthetic fuels, first with tar-sands oil and later with oil from coal and shale. (According to high-end estimates, coal and oil shale could together yield some ten trillion barrels of unconventional crude.) They then calculated what the impact would be on global carbon-dioxide levels.
While conspiracy theorists may want to believe that Big Oil, Big Coal and Big Nuclear are stifling the growth of renewables, the simple truth is that coal, oil, natural gas and nuclear can satisfy the Four Imperatives: power density, energy density, cost and scale.
Natural gas is a cleaner fuel than coal and crude oil and is becoming increasingly important with governments across the world encouraging the production and use of natural gas over coal and crude oil for energy generation.
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Human sources come principally from the burning of fossil fuels such as coal, oil and gas.
The United States is fortunate enough to have large coal, oil, and gas deposits.
Green energy may have its day, but only when coal, oil and gas become truly scarce.
Now phase that up into enormous industries like the natural gas, coal or oil industry.
In 1949 nearly 91% of America's total primary energy came from coal, oil, and natural gas.
Those heat-trapping gases are from the burning of fossil fuels like coal, oil and gas.
Coal, oil and gas will continue to play an important role in our energy portfolio for decades.
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Cheapened dollars have already wrought financial trouble, but solar power costs far more than coal or oil.
But the proponents of natural gas see harmony, not competition, with coal and oil the real enemies.
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But the government had been prepared for a clash with the miners and had stockpiled coal and oil.
These are already cheaper and cleaner than burning coal, oil and gas with all their pollutants, especially CO2.
The background level of tropospheric ozone is inexorably rising as volatile organic compounds are released from burning coal and oil.
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The Pakistanis, for example, have a surfeit of energy resources, notably huge untapped reserves of natural gas, coal and oil.
This would lessen the need to burn coal and oil, and lead to reduced emissions of carbon dioxide and nitrous oxide.
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For coal, oil or natural gas, about two to three months of annual deliveries are in storage at any given time.
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Yet, coal and oil fired power plants, the single-largest source of mercury emissions, were never included in the limits until now.
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Democrats from states with coal and oil probably will be stumbling blocks.
Coal, oil and gas pollute and are increasingly expensive: We need alternatives.
Stone, bronze, iron, gold, coal and oil are but a few of a long list of geological resources that have helped shape society.
South Africans regard Sasol--originally the South African Coal, Oil and Gas Corporation--in the same way Brits do BP, Norwegians Statoil and Italians AGIP.
When it comes to the amount of energy released when coal or oil is burned, the new green technologies are still way behind.
In the last 200 years Coal, Oil and Nuclear has given energy to many worldwide and great power and wealth to only a few.
The Navy has always led in energy transformations, moving from wind to coal, coal to oil, and then pioneering the use of nuclear power.
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It is seen, therefore, as a bridge fuel, one that takes us from coal and oil to some mix of carbon-free energy in the future.
The 21st century will be remembered as the resurgent coal and oil century, or as the century humanity transitioned to green technologies for energy consumption.
Importing fossil fuel is one solution, but the environmentally minded Swedes are unhappy about the greenhouse-gas implications of burning more coal, oil and natural gas.
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