Do you ever wonder, "Why is conserving energy important?" There are many reasons why you should be concerned about conserving energy whenever possible. Learn more about the short and long term importance of keeping energy usage under control.
Taking Energy for Granted
Few people consider where electricity comes from when they flip on a light or push the start button on a computer. Almost everyone in America has grown up in homes that were powered by electricity. This makes it very easy to take energy for granted, without realizing the cost to both the environment and to your bank account.
The truth is that all energy produced and used has an impact on the environment. Even energy from completely natural sources impacts the earth. For example, even the energy from a lightning strike of a tree often results in the tree being burned. How detrimental that impact is will be determined by the type of energy and the amount used.
Why Is Conserving Energy Important to You?
There are two main reasons why conserving energy is important on a global level and each can impact your life dramatically.
1. Fossil Fuel Consumption
Many types of energy use fossil fuels in some way. Fossil fuels are a nonrenewable resource, meaning that at some point the very last chunk of coal will be dug from the earth and the last drop of oil will be pumped from the Earth. When this happens, fossil fuel won't be available anymore since mankind can't create these resources.
- Most vehicles run on gasoline, which is made from a fossil fuel. Once there are no more fossil fuels then the gas powered vehicles won't work. Commerce would grind to a stop with no way to deliver produce and manufactured goods.
- The many other types of energy that depend on fossil fuels would no longer work. Homes and businesses would not be heated or in some cases have no electricity. The entire world could come to a standstill, unable to go about normal business.
- Conserving energy gives researchers more time to come up with solutions and alternatives. Although fossil fuels will eventually be depleted, by being careful not to use energy unwisely fossil resources may last long enough for practical solutions to be found.
- Fossil fuels are also expensive to mine. This expense doesn't just affect the business paying the bill; it's passed on the consumers as higher prices for goods and services. By being conservative in the use of energy, these costs can be reduced to give consumers more money in their pockets. In turn, this can strengthen the economy since people will have more disposable income when they spend less on energy needs.
2. Environmental Protection
The other reason for conserving energy is the health and well-being of every life form on the entire planet. Using fossil fuels and some other energy forms typically pollute the environment in a number of ways.
- The air is polluted when fossil fuels like coal are burned and released into it.
- Nuclear energy is clean and does not pollute the air but it does create nuclear waste, which is dangerous and must be disposed of. Currently, this waste is buried in nuclear water dumps, both above and below ground. In addition, the water used to cool the reactors is recycled into lakes and rivers usually 25 degrees warmer than when it was taken from the lake or river. The impact on marine life is harmful.
- Solar power is a clean energy source, and a renewable one, but the production of the solar panels usually creates pollutants and waste products during the manufacturing process.
- When water is polluted during the process of creating energy, it can change the eco-system by killing off many different types of wildlife and plants. For example, marine life can be killed when a nuclear plant intakes water from lakes or rivers.
- The soil is polluted when pollutants in the air mix with rain and form acid rain.
- Every type of pollution can potentially compromise the human body and create health problems. These issues are especially dangerous for people with compromised immune systems, babies and the elderly.
- High energy needs keep a country dependent on foreign governments to supply oil since the majority of the world's countries do not produce enough oil for themselves.
Protecting the Environment for Future Generations
Why is conserving energy important? As you can see there are many reasons that conservation is important, ranging from the environment to the economy. The world's dependence on fossil fuels is creating a problem that will affect generations to come. It is important that energy not only be conserved, but also that research continues to find cleaner and better solutions for future generations.
For the physical concepts, see conservation of energy and energy efficiency.
Energy conservation is a process used to reduce the quantity of energy that is used for different purposes. This practice may result in increase of financial capital, environmental value, national and personal security, and human comfort.
Individuals and organizations that are direct consumers of energy may want to conserve energy in order to reduce energy costs and promote economic, political and environmental sustainability. Industrial and commercial users may want to increase efficiency and thus maximize profit.
On a larger scale, energy conservation is an important element of energy policy. In general, energy conservation reduces the energy consumption and energy demand per capita. This reduces the rise in energy costs, and can reduce the need for new power plants, and energy imports. The reduced energy demand can provide more flexibility in choosing the most preferred methods of energy production.
By reducing emissions, energy conservation is an important method to prevent climate change. Energy conservation makes it easier to replace non-renewable resources with renewable energy. Energy conservation is often the most economical solution to energy shortages.
Energy efficiency trends in the United States[change | change source]
The U.S. is currently the largest consumer of energy, although at current levels of growth, it is possible that in the future China could become the leading energy consumer. The U.S. Department of Energy categorizes national energy use in four broad sectors: transportation, residential, commercial, and industrial.
Energy usage in the transportation and residential sectors (about half of U.S. energy consumption) is largely controlled by individual domestic consumers. Commercial and industrial energy usage are controlled by businesses. National energy policy has a significant effect on energy usage across all four sectors.
Transportation sector[change | change source]
The transportation sector includes all vehicles used for personal or freight transportation. Of the energy used in this sector, approximately 65% is consumed by gasoline-powered vehicles, primarily personally owned. Diesel-powered transport (trains, merchant ships, heavy trucks, etc.) consumes about 20%, and air traffic consumes most of the remaining 15%.
The oil supply crises of the 1970s spurred the creation, in 1975, of the federal Corporate Average Fuel Economy (CAFE) program, which required auto manufacturers to meet progressively higher fleet fuel economy targets. The next decade saw dramatic improvements in fuel economy, mostly the result of reductions in vehicle size and weight. These gains eroded somewhat after 1990 due to the growing popularity of sport utility vehicles, pickup trucks and minivans, which fall under the more lenient "light truck" CAFE standard.
In addition to the CAFE program, the U.S. government has tried to encourage better vehicle efficiency through tax policy. Since 2002, taxpayers have been eligible for income tax credits for gas/electric hybrid vehicles. A "gas-guzzler" tax has been assessed on manufacturers since 1978 for cars with exceptionally poor fuel economy. While this tax remains in effect, it currently generates very little revenue as overall fuel economy has improved.
Another focus in gasoline conservation is reducing the number of miles driven. An estimated 40% of American automobile use is associated with daily commuting. Many urban areas offer subsidizedpublic transportation to reduce commuting traffic, and encourage carpooling by providing designated high-occupancy vehicle lanes and lower tolls for cars with multiple riders.
In recent years telecommuting has also become a viable alternative to commuting for some jobs, but as of 2003 only 3.5% of workers were telecommuters. Ironically, hundreds of thousands of American and European workers have been replaced by workers in Asia who telecommute from thousands of miles away.
A vehicle's gas mileage normally decreases rapidly at speeds above 55 miles per hour. A car or truck moving at 55 miles an hour can get about 15 percent better fuel economy than the same car going 65 mph. According to the U.S. Department of Energy (DOE), as a rule of thumb, each 5 mph you drive over 60 mph is similar to paying an additional $0.21 per gallon for gas (at $3.00 per gallon).
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The residential sector refers to all private residences, including single-family homes, apartments, manufactured homes and dormitories. Energy use in this sector varies significantly across the country, due to regional climate differences and different regulation. On average, about half of the energy used in the U.S. homes is expended on space conditioning (i.e. heating and cooling).
The efficiency of furnaces and air conditioners has increased steadily since the energy crises of the 1970s. The 1987 National Appliance Energy Conservation Act authorized the Department of Energy to set minimum efficiency standards for space conditioning equipment and other appliances each year, based on what is "technologically feasible and economically justified".
Despite technological improvements, many American lifestyle changes have put higher demands on heating and cooling resources. The average size of homes built in the United States has increased significantly, from 1500 ft² in 1970 to 2300 ft² in 2005. The single-person household has become more common, as has central air conditioning: 23% of households had central air conditioning in 1978, that figure rose to 55% by 2001.
As a cheaper alternative to the purchase of a new furnace or air conditioner, most public utilities encourage smaller changes the consumer can make to lessen space conditioning usage. Consumers have also been asked to adopt a wider indoor temperature range (e.g. 65 °F in the winter, 80 °F in the summer).
Home energy consumption averages:[change | change source]
- space conditioning, 44%
- water heating, 13%
- lighting, 12%
- refrigeration, 8%
- home electronics, 6%
- laundry appliances, 5%
- kitchen appliances, 4%
- other uses, 8%
Energy usage in some homes may vary widely from these averages. In most residences no single appliance dominates, and any conservation efforts must be directed to numerous areas in order to achieve substantial energy savings. However, Ground Source Heat Pump systems are the more energy efficient, environmentally clean, and cost-effective space conditioning systems available (Environmental Protection Agency), and can achieve reductions in energy consumptions of up to 70%.
Best building practices[change | change source]
Current best practices in building design and construction result in homes that are much more energy conserving than average new homes. See Passive house, Superinsulation, Self-sufficient homes, Zero_energy_building, Earthship, Straw-bale construction, MIT Design Advisor, Energy Conservation Code for Indian Commercial Buildings.
Smart ways to construct homes such that minimal resources are used to cooling and heating the house in summer and winter respectively can significantly reduce energy costs!
Commercial sector[change | change source]
The commercial sector consists of retail stores, offices (business and government), restaurants, schools and other workplaces. Energy in this sector has the same basic end uses as the residential sector, in slightly different proportions. Space conditioning is again the single biggest consumption area, but it represents only about 30% of the energy use of commercial buildings. Lighting, at 25%, plays a much larger role than it does in the residential sector. Lighting is also generally the most wasteful component of commercial use. A number of case studies indicate that more efficient lighting and elimination of over-illumination can reduce lighting energy by approximately fifty percent in many commercial buildings.
Commercial buildings can greatly increase energy efficiency by thoughtful design, with today's building stock being very poor examples of the potential of systematic (not expensive) energy efficient design (Steffy, 1997). Commercial buildings often have professional management, allowing centralized control and coordination of energy conservation efforts.
Solar heat loading through standard window designs usually leads to high demand for air conditioning in summer months. An example of building design overcoming this excessive heat loading is the Dakin Building in Brisbane, California, where fenestration was designed to achieve an angle with respect to sun incidence to allow maximum reflection of solar heat; this design also assisted in reducing interior over-illumination to enhance worker efficiency and comfort.
Industrial sector[change | change source]
The industrial sector represents all production and processing of goods, including manufacturing, construction, farming, water management andmining. Increasing costs have forced energy-intensive industries to make substantial efficiency improvements in the past 30 years. For example, the energy used to produce steel and paper products has been cut 40% in that time frame, while petroleum/aluminum refining and cement production have reduced their usage by about 25%. These reductions are largely the result of recycling waste material and the use of cogeneration equipment for electricity and heating.
The energy required for delivery and treatment of fresh water often constitutes a significant percentage of a region's electricity and natural gas usage (an estimated 20% of California's total energy use is water-related.) In light of this, some local governments have worked toward a more integrated approach to energy and water conservation efforts.
Unlike the other sectors, total energy use in the industrial sector has declined in the last decade. While this is partly due to conservation efforts, it's also a reflection of the growing trend for U.S. companies to move manufacturing operations offshore.
The usage of telecommuting by major corporations is a significant opportunity to conserve energy, as many Americans now work in service jobs that enable them to work from home instead of commuting to work each day. 
Related pages[change | change source]
References[change | change source]
- ↑US Dept. of Energy, "Annual Energy Report" (July 2006), Energy Flow diagram
- ↑US Dept. of Energy, "Annual Energy Outlook" (February 2006), Table A2
- ↑US Dept. of Energy, "Buildings Energy Data Book" (August 2005), sec. 1.2.3
- ↑US Dept. of Energy, "Buildings Energy Data Book" (August 2005), sec. 1.3.3
- ↑California Energy Commission, "California's Water-Energy Relationship" (November 2005), p.8
- ↑Best Buy Optimas Award Winner for 2007
- Scott Davis, Dana K. Mirick, Richard G. Stevens (2001). "Night Shift Work, Light at Night, and Risk of Breast Cancer". Journal of the National Cancer Institute93 (20): 1557-1562. http://jncicancerspectrum.oupjournals.org/cgi/content/full/jnci;93/20/1557?ijkey=e1472aefe9398c2c26bf8515391f5940acc05495.
- Bain, A., “The Hindenburg Disaster: A Compelling Theory of Probable Cause and Effect,” Procs. NatL Hydr. Assn. 8th Ann. Hydrogen Meeting, Alexandria, Va., March 11-13, pp 125-128 (1997)
- Gary Steffy, Architectural Lighting Design, John Wiley and Sons (2001) ISBN 0-471-38638-3
- Lumina Technologies, Analysis of energy consumption in a San Francisco Bay Area research office complex, for (confidential) owner, Santa Rosa, Ca. May 17, 1996
- GSA paves way for IT-based buildings 
Other websites[change | change source]
- Resources for homes
- Government and international websites