I don't know for certain but I expect wind power is the least widely used (wave power and tidal power are not used commercially at all yet, I believe). A lot depends on your definition of 'widely used'. Do you mean megawatts generated in a given time?
It is false that hydro is the least widely used. There are many renewable energy sources, and hydro power is one of the most commonly used, with many installations all over the world. Unconventional renewable power sources that have been used include such ideas as extracting energy from the impact of people's feet as they walk on sidewalks, which is just one of many examples of sources less commonly used than hydro.
The correct order of US energy consumption by source from most to least is petroleum, natural gas, coal, renewable energy, and nuclear energy.
Renewable energy sources such as wind, solar, and hydroelectric power are generally considered to be the least damaging to the environment compared to fossil fuels like coal, oil, and natural gas. These renewable sources produce lower greenhouse gas emissions and have minimal impact on air and water quality.
are you dum?a circuit with a source of energy and at least one conductor is blah.
The least expensive energy source causes too much pollution
Geothermal
fossil fuels are the least costly for us to use.
Nucleic acids are used the least by humans as an energy source compared to carbohydrates, proteins, and fats. Nucleic acids are primarily used for genetic information and not as a direct energy source for the body.
A conventional source of energy would be one that has been in use for quite a while - say, for a few decades at least, and on a sufficiently large scale. This is not the case with lightning.A conventional source of energy would be one that has been in use for quite a while - say, for a few decades at least, and on a sufficiently large scale. This is not the case with lightning.A conventional source of energy would be one that has been in use for quite a while - say, for a few decades at least, and on a sufficiently large scale. This is not the case with lightning.A conventional source of energy would be one that has been in use for quite a while - say, for a few decades at least, and on a sufficiently large scale. This is not the case with lightning.
Nuclear energy is the alternative energy source that is least dependent upon the weather. Unlike solar or wind power, nuclear power generation is not affected by weather conditions such as sunlight or wind.
There are 104 operating nuclear reactors in the US and at least 400 world wide.
The most abundant source of calories in the human body is glycogen, which is stored in the liver and muscles, while the least expensive source of calories is body fat, which is used as a reserve energy source.