The three sources of food energy are protein, carbohydrates (sugars), and fats.
bread
Carbs, Protein, Fat
Probably we (mankind) will have to use a variety of energy sources, not just "one best" energy source.Probably we (mankind) will have to use a variety of energy sources, not just "one best" energy source.Probably we (mankind) will have to use a variety of energy sources, not just "one best" energy source.Probably we (mankind) will have to use a variety of energy sources, not just "one best" energy source.
Yes. People eat food all the time. food is one of the sources your body needs to get energy to do stuff.
Mitochondria
yes
Only via energy we receive from the sun
uh...there is the fossil fuels- coal oil and natrualgas, but I don't know the last one...edit:Uranium!!!
one natural resource is the sun
In nutrition, yes
One can find more information on energy efficient lighting from the following sources: Earth Easy, Energy Star, Carbon Trust, Living Greener, NSW Environment and Heritage, Energy Saving Trust, to name a few.
The hypothesis of solar energy states that solar energy will be one of the leading sources of energy in the world in the years to come.