1. GREEN COMPUTING

2. What is Green Computing?
The study and practice of designing,
manufacturing, using and disposing of
computers and associated subsystems such as
monitors, printers, storage devices,
networking and communication systems
efficiently and effectively with no impact on
the environment.

3. Why Green Computing
• Why
– Computer Energy is Often Wasteful
• Leaving the computer on when not in use (CPU and
fan consume power, screen savers consume power)
• Insufficient Power and Cooling Capacities
• Data centers have insufficient cooling capacities.
-Pollution
• Manufacturing techniques
• Packaging
• Disposal of computers and components
-Toxicity
• There are toxic chemicals used in the manufacturing of
computers and components which can enter the food
chain and water!

4. Consequences of Non-Green Computing
Release of harmful gases from electronics
More utilization of power and money
Increase of E-waste and improper disposal

5. Manufacturing of PCs-
Hazards.
Lead: Used in soldering of printed circuit boards.
Lead can cause damage to the central and
peripheral nervous system , blood systems
and kidneys.
Mercury: Used in batteries, switches . Mercury spreads
out in water transforming into methylated
mercury that can cause chronic brain damage.
Cadmium: Used in resistors for chips and in
semiconductors . Cadmium is classified as toxic,
these compounds accumulate in the human body,
particularly the kidneys.

6. Green Disposal
Reuse: donate your computer components to people who may not have or
have lesser quality computers.
Refurbish: rather than discarding your computer upgrade it. Change its
some of the parts in order to make it new.
Recycle: One of the major challenges is recycling the printed circuit
boards from the electronic wastes. The circuit boards contain such precious
metals as gold, silver, platinum, etc. and such base metals as copper, iron,
aluminum.

7. Powering in an E-mail System
Energy is consumed in three places when a user check their email
• The Client: The PC, laptop, phone or other device directly accessing
email is called the client. Its using electricity as it fetches and displays
email.
• The Network: Wireless routers, network switches and all the
intervening networking equipment between the client and the email
server use electricity.
• The Server: The computer or group of computers receiving, sending
and storing email is called email server. This machine and group of
machines is constantly ON and consuming electricity.

8. Research and Development
IBM in 1990 saved around 4.6 billion kWh of electricity and
prevented almost 3 million metric tones of CO2 emissions.
Since 2007, Google has been a carbon neutral company,
utilizing energy efficient improvements, green power and
carbon offsets to bring our footprint down to zero.
Users of Gmail also enjoy this benefit of zero carbon
emission email.
Choosing Gmail over a locally hosted server can mean an
annual per-user power savings of up to 170 kWh and a
carbon footprint reduction of up to 100 kg of CO2

9. How to go Green
Turn off the computer when not in use, even if just
for an hour
Turn off the monitor when not in use
Use power saver mode
Use hardware/software with the Energy Star label
Don’t print unless necessary and you are ready
Use LCDs instead of CRTs as they are more power efficient
Consider a smaller monitor-a 14-inch display uses 40% less
energy than a 17-inch one.
Enable Stand By/Sleep mode.
Recycling

10. Energy Star
One of the first manifestations of the green computing movement was the launch of
energy star program back in 1992.
Energy Star served as a kind of voluntary label awarded to computing products
that succeeded in minimizing use of energy while maximizing efficiency.
Energy Star applied to products like computer monitors, television sets and
temperature control devices like refrigerators, air conditioners, and similar items.

11. Green Web Surfing
Greener Google Browsing:Blackle.com
Being Green with Yahoo!
Greener FireFox Surfing
Other Green Surfing Efforts

12. How to save energy while
working on the internet ?
Blackle is a website powered by Google Custom Search and
created by Heap Media, which aims to save energy by
displaying a black background and using grayish-white font
color for search results.
Blackle saves energy because the screen is predominantly
black
Blackle claims having saved 3.12 MWh (megawatt hours) of
electrical energy up to now (May 28th 2012)

13. How to save energy while
working on the computer?
Sleep mode:
Sleep or standby mode conserves energy by cutting off power to your
display, hard drives and peripherals.
After a pre-set period of inactivity, your computer switches to a low power
state.
Hibernate mode :
Saves energy and protects your work by copying system data to a reserved
area on your hard drive and then completely turning off your computer.
Reduces wear and tear on your components.

14. Power managementPower Management
• CRT Monitor (17”) uses 80 watts.
• LCD Monitor (17”) uses 35 watts.
• LED Monitor (17”) uses 25 watts.
LEDs – Rare and Expensive
LCDs preferred for general users.
Energy Star Rated Computer – 80% energy
Efficient.
Without Energy Star Rated Computer – 70%
Efficient.

15. Global warmingGlobal Warming
► Ice cap at the North Pole continues
to shrink!
1979 2009

16. Three areas of focus
Three areas of focus
•Purchase/Disposal
Responsible computer purchase and disposal
considerations.
• Energy use
Energy use and efficient ways to computing.
•Reducing waste
Using computers to reduce the use of natural
resources.

17. Algorithm Efficiency
The efficiency of algorithms has an impact on the amount of
computer resources required for any given computing function.
Carbon Dioxide Released per search:
Google Search ≈ 0.20gm
Microsoft Live Search ≈ 0.32gm
Yahoo Search ≈ 0.26gm
AOL Search ≈ 0.37gm.

18. Material Recycling
Disposal of the computing devices
constitute 20-50 million tons per
year (about 5% of the total waste of
the planet)
•this waste is called e-waste
Where are we going to pull all of it?
e-waste handling
Reuse
Refurbish

19. General suggestionGeneral Suggestions
• Change your subscriptions to online – not
paper .
• Optimize computer performance.
• Decrease screen brightness.
• Change from XP to Vista.
• Consider LCDs over CRTs.
• Consider laptops over desktops.
• Have a energy efficient approach.

20. How Can We Help…??
o Put Laptop On Sleep
o Use Eco Friendly Search Engines.
o From Paper Go Online Subscription.
o Optimize Performance Of Laptop
o Do not Use A ScreenSaver

21. Benefits of Green Computing
Reduces the amount of pollutants in the
surroundings.
It saves the power consumption and reduces
the amount of heat produced from the
electronics.
It reduces the burden on paper industry.
Encourages the use of Renewable Resources.
Promotes effective utilization of natural
resources.

22. Advantages
• Reduce Energy Usage
• Conserving Resources
• Reduces The Risk
• Saving The Energy
• Saving The Planet

23. Disadvantages
• High Start Up Cost
• Not Readily Available
• Still in experimental
stages

24. Remember Save energy and our
environment
Remember…
Charity may begin at home, but
green computing begins at the
desktop.

25. Thank You

26. QUERIES??