SAVING ENERGYSAVING ENERGY
• TYPES OF ENERGYTYPES OF ENERGY
• WIND:wind power is the conversion ofWIND:wind power is the conversion of
wind energy into a useful form of energy.wind energy into a useful form of energy.
• SOLAR:is the radiant light and heat of theSOLAR:is the radiant light and heat of the
• HIDROPOWER: is electricity generated byHIDROPOWER: is electricity generated by
Wind powerWind power
Wind is simply air in motion. It isWind is simply air in motion. It is
caused by the uneven heating ofcaused by the uneven heating of
the Earth's surface by the sun.the Earth's surface by the sun.
Because the Earth's surface isBecause the Earth's surface is
made of very different types ofmade of very different types of
land and water, it absorbs theland and water, it absorbs the
sun's heat at different rates.sun's heat at different rates.
Solar energySolar energy
The sun has produced energy forThe sun has produced energy for
billions of years. Solar energy isbillions of years. Solar energy is
the sun’s rays (solar radiation)the sun’s rays (solar radiation)
that reaches the Earth. Thisthat reaches the Earth. This
energy can be converted intoenergy can be converted into
other forms of energy, such asother forms of energy, such as
heat and electricity.heat and electricity.
Hydropower is the renewableHydropower is the renewable
energy source that producesenergy source that produces
most of the electricity in themost of the electricity in the
United States. It accounted for 6%United States. It accounted for 6%
of total U.S. electricity generationof total U.S. electricity generation
and 67% of generation fromand 67% of generation from
renewables in 2008.renewables in 2008.
Using power management features on
your computer can save more than 600
KWh of electricity and more than $60 a
year in energy costs. That equates to
nearly half a ton of CO2 – more than
lowering your home thermostat by two
degrees Fahrenheit in the winter or
replacing six standard light bulbs with
compact fluorescents. Follow the steps
below to ensure your computer is
operating more efficiently.
When enabled, power management places your monitor,
hard drives and computer into a low-power “sleep” mode
after a period of inactivity. A simple touch of the mouse or
keyboard “wakes” the computer, hard drive and monitor in
seconds. Power management features are standard in
Windows and Macintosh operating systems.
The use of power management can reduce energy
consumption and cooling costs, reduce noise, and
prolong the battery life of laptop PCs. And when your PC
consumes less power, you reduce your impact on the
To improve the power efficiency of your PC, the Climate
Savers Computing Initiative recommends the following
power management settings:
Monitor/display sleep: Turn off after 15 minutes or less
Turn off hard drives/hard disk sleep: 15 minutes or
System standby/sleep: After 30 minutes or less
Instructions for enabling power management vary by
operating system. Click the links to the right for detailed
instructions by operating system.
You can also download a printable PDF with instructions
for enabling power management in all of the above
1. Use computer and monitor power management. Doing so can save
nearly half a ton of CO2 and more than $60 a year in energy costs.
2. Don’t use a screen saver. Screen savers are not necessary on modern
monitors and studies show they actually consume more energy than
allowing the monitor to dim when it’s not in use.
3. Buying a new computer? Make energy efficiency a priority while
shopping for your PC and monitor. Look for the ENERGY STAR label or
browse the Climate Savers Computing product catalog.
4. Turn down the brightness setting on your monitor. The brightest setting on
a monitor consumes twice the power used by the dimmest setting.
5. Turn off peripherals such as printers, scanners and speakers when not in
6. Fight phantom power; plug all your electronics into one power strip and turn
the strip off when you are finished using your computer. When feasible, we also
recommend unplugging the power strip from the wall to avoid high voltage
surges which may occur during an electrical storm.
7. Use a laptop instead of a desktop. Laptops typically consume less power than
8. Close unused applications and turn off your monitor when you’re not using it.
9. Use a power meter to find out how much energy your computer actually consumes
and to calculate your actual savings.
10. Establish multiple power schemes to address different usage models. For example,
you can create a power scheme for playing music CDs that shuts off your hard drive
and monitor immediately, but never puts your system into standby mode.