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Because for them to replenish takes millions of year.

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Q: Why are fossil fuels considered to be non renewable energy sources?
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Is hydrogen a fossil fuel?

Hydrogen is not a fossil fuel because it is renewable. Sources of energy that are non-renewable are considered fossil fuels


What are the different types of non-renewable energy?

- Fossil fuel energy sources (coal-natural gas - petroleum - wood) - Nuclear energy sources (fission - fusion). Nuclear energy may be considered as renewable energy source.


Why should fossil fuels be conserved renewable energy sources are available?

Renewable energy cannot, at present, replace fossil fuels or our use of them.


Is fossil fuel another name for non-renewable energy?

yes, fossil fuel is another name for non-renewable energy sources.


What are oil coal and gas considered?

Non-renewable sources of energy - fossil fuels (coal, oil and natural gas).


Why are renewable energy sources needed?

Because if we use renewable sources, it's with us forever. fossil fuels and non-renewable sources will run out someday.


What energy sources is not renewable?

Energy from the burning of fossil fuels (coal, oil and natural gas) is non-renewable.


Which energy sources are considered nonrenewable?

Coal oil and natural gas are non-renewable energy sources in that they take millions of years to form in Nature. They are all called Fossil fuels.


Is energy derived from renewable sources better than that produced from fossil fuels?

Fossil fuels are non-renewable so have a finite supply. This means that they will eventually run out. They also produce carbon dioxide when burnt which contributes towards global warming. Renewable sources do not pollute the atmosphere and do not run out. Therefore renewable sources are better for the environment, but fossil fuels give more energy per mass. Which is better depends on what you look for, environment and sustainability or high density of energy. Renewable energy still gives out sufficient energy, so renewable sources are better.


What are two renewable energy sources and two fossil fuels?

Renewable energy sources:Wind power is a renewable energy source.Solar power is another.Fossil fuels: Coal is one of the fossil fuels (coal, oil and natural gas).Oil is another.


Which of the sources of energy in the world is not renewable?

Fossil fuels (coal, oil and natural gas).


Is energy resource or nonrenewable?

It depends where it comes from. Energy from solar, wind, water etc is renewable. Energy from burning fossil fuel is non-renewable.