Fusion reactions take over as the star's primary source of energy, and the star is then on the main sequence.
Clean energy categorizes all of our primary current energy sources except for fossil fuels, the primary source of energy.
Fuel wood is the primary source of energy in rural areas of the Himalaya.
Combustion processes have been the world's primary source of energy for over 700 000 years.
If China could replace coal with oil as a primary source of energy, emissions would drop by one third.
Without this primary source of energy for the estuary, changes in the balance of nature occur in the coastal woodlands and extend to the offshore barrier islands.
This is not the first time that France – where nuclear is the primary source of energy – has offended Japanese sensibilities over Fukushima.
Eating more frequently — five to six times a day — provides us with regular doses of glucose, which is the body's primary source of energy.
Though it has been supplanted by oil and natural gas as the primary source of energy in most modern industrial nations, coal nonetheless remains an important fuel.
The reason it is the most rapidly growing source of emissions is that it is the primary source of energy in India and China.
Stickland reactions are a primary source of energy for a small group of anaerobic bacteria grown that typically use amino acids as their sole carbon and nitrogen sources23.
