These are obstacles inherent in the source of the energy that will be difficult to surmount.
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Knies is hopeful that soon the world will embrace solar power as the leading source of energy.
Jim Yong Kim, speaking at Davos, said the institution should not "turn its back" on poor nations that seek the cheap source of energy.
In the wake of the 70s oil crisis, Selby was touted an assured source of energy for the UK. It was forecast that 10 million tons of coal a year would be dug there for 40 years.
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He said the Bridgend plant will be the sole global source of the clean energy engine and it was a "real feather in the cap" for Wales.
Veolia Environmental Services was the other firm fighting to run the incinerator, and whose spokesperson said it believed it was "sympathetic with the local environment and represented a unique opportunity to use the residual waste to provide a secure source of sustainable energy and heat to the neighbouring Tata Steel steelworks - a major source of employment in the area".
In the past, all technologies were subsidised equally, so most investment went into onshore wind, the cheapest source of renewable energy.
But in the short term, at least, coal will remain a key source of energy for the U.S. mainly because the cost of running coal and natural gas power plants remains comparable.
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Mr. Moffett has long believed that the shallow waters of the Gulf, though widely considered a spent energy source, have phenomenal deposits of natural gas far beneath the pincushion of drilling sites from earlier decades.
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Moreover, the fiscal, monetary and macroeconomic effects will be significant as the Levant Basin, the area of the Leviathan and other fields, emerges as a source of energy exports.
We know that the Brazilian energy matrix is a renewable source of energy that Brazil has.
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They are home to the strangest ecosystems known, in which organisms get by without sunlight, using as an alternative source of energy the sulphurous gases spewed from deep inside the earth.
Nevertheless, many environmentalists fiercely resist any moves to ease arbitrary, prohibitive barriers to the construction of the best non-carbon-dioxide-producing energy source of all: nuclear power plants.
"To me it was clear that depleting natural resources and rising fuel costs make solar the energy source of choice for tomorrow, " the entrepreneur explains.
But Mr Bauer's keenness to change the subject suggests that the religious right is not the source of intellectual and emotional energy that it used to be.
Nor does the wind blow (a likely source of some of their bought in energy) all of the time.
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The general concept is known as energy harvesting, which simply refers to the gathering of energy from one source and applying it to power an object.
Reiki, the Japanese art of laying on hands, is based on the notion that an unseen, life-giving source of energy flows through our bodies.
We've got to invest in a sustained, all-of-the-above strategy that develops every available source of energy.
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Units of New Source Energy Partners fell, making the owner of developed and undeveloped oil and natural-gas properties in Oklahoma the latest master limited partnership to struggle at the outset of trading.
And conservative America, once solidly sceptical, is now split over the issue, as Christians concerned about mankind's stewardship of the Earth, neo-cons keen to reduce America's dependency on the Middle East and farmers who see alternative energy as a new potential source of energy come round to the idea of cutting down on carbon.
This mechanism apparently evolved to help the body preserve a vital source of energy.
"It's the most benign and efficient source of energy that I can imagine, " he says.
Interestingly, an April 18 paper in the journal Nature reported that upper limits for neutrinos measured from IceCube are low enough that gamma-ray bursts are unlikely to be the sole source of ultra-high energy cosmic rays.
It results from the 1.6 billion people that do not have any access to electricity whatsoever, the 2.4 billion that have almost no access to electricity and still burn wood and manure as their main source of energy, and the 3 billion new people that will be born by mid-century who will need electricity.
We need an all-out, all-of-the-above strategy that develops every available source of American energy.
We have to pursue an all-of-the-above strategy that helps develop every source of American energy.
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The second thing: Everybody sees energy as a prime source of growth in the future, and we're already slipping behind.
Skeptics have argued that it is absurd to downplay the role of the sun, as it is the energy source driving the entire climate system.
The difference is merely whether the same quantity of waste heat energy is thrown away at the source or in the vehicle.
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