Electricity is the main source of energy for this process.
Domestic reserves of gas, the main source of energy, are not plentiful.
It is a key technology, he said, for a "world where petroleum is not our main source of energy".
But it also seems that the movie's main source of energy lies elsewhere, in the electromagnetic forces of desire, jealousy, violence and cinema itself.
China - a traditional ally of Pyongyang and its main source of energy and food - called the test a "flagrant and brazen" violation of international opinion.
Although the concentration of carbon in the Earth's crust does not exceed 0.1 percent by weight, it is indispensable to life and constitutes humankind's main source of energy.
In larval and adult cestodes, carbohydrate occurs chiefly as animal starch, or glycogen, which acts as the main source of energy for species in low oxygen habitats.
He had successfully lobbied his party to change its official designation of nuclear power from a "transitional" to "main" source of energy.
In fact, carbohydrates are our main source of energy, converted by the body to power our cells and keep us alive and growing.
However, in a healthy diet carbohydrates should be the main source of energy, so including a moderate amount of carbs in your diet is sensible.
Fossil fuels are nowadays the main source of energy.
