Alternative Energy Sources
Energy creates change. It makes things work for us. It can come from many sources and in many forms, such as light, heat, sound, and motion. Energy is classified into two groups: nonrenewable or renewable resources. These are both primary resources, meaning the actual resource creates the energy. Or secondary energy resources, which are energies created from the primary resources.
Primary Resources
Energy from the ground that has limited supplies, either in the form of gas, liquid or solid, are called nonrenewable resources. They cannot be replenished, or made again, in a short period of time.Examples of nonrenewable energy resources include:
- Oil (Petroleum)
- Natural gas
- Coal
- Uranium (nuclear)
Energy that comes from a source that’s constantly renewed, such as the sun and wind, can be replenished naturally in a short period of time. Because of this we do not have to worry about them running out. Examples of renewable energy resources include:
- Solar
- Wind
- Geothermal
- Biomass
- Hydro
- Ocean
Secondary Resources
Energy that is converted from these primary sources forms secondary sources of energy. These secondary sources of energy are used to store, move, and deliver energy in easily usable form. Examples of secondary resources of energy include:
- Electricity
- Hydrogen
So which resource is best?
It depends. Many alternative sources of energy are still being researched and tested. Technologies are continually being developed and enhanced to improve alternative sources of energy. Not all energies are ready for mass consumption, so you have to ask the right questions to find out which energy source does the job.
- Is it a renewable or nonrenewable source?
- What are the capital costs of setup?
- What are the ongoing operating costs?
- What size of energy storage is required?
- How efficient is it to produce one unit of energy?
- Can it be produced on a large scale?
- What is the cost to the consumer?
- What effect will it have on the environment?
To compare the various types of energy, the pros and cons, and the costs, see this chart .
