This document discusses green computing and how to reduce the environmental impact of computers and technology. It notes that computer energy use is often wasteful if devices are left on unnecessarily. Printing is also wasteful if done excessively. Manufacturing and disposing of electronics causes pollution and toxicity issues. Used electronics are considered e-waste, which is a growing problem as devices are replaced more quickly. The document provides tips for reducing energy consumption including using power saver modes, purchasing Energy Star certified devices, limiting printing, and replacing CRT monitors with more efficient LCDs. It also discusses approaches to green computing like algorithm efficiency and material recycling.

1. Green computing
By:
Ridhvesh Shethwala
E.NO:110240107034

2. Why need green computing?
=> computer energy is often wasteful
• leaving the computer on when not in use
(CPU and fan consume power, screen
savers consume power)
–printing is often wasteful
• how many of you print out your emails or
meeting agendas
• printing out partial drafts
• for a “paperless” society, we tend to use
more paper today than before computer-
prevalence

3. –pollution
• manufacturing techniques
• packaging
• disposal of computers and
components
–toxicity
• as we will see, there are toxic
chemicals used in the manufacturing
of computers and components which
can enter the food chain and water!

4. E-wastE
What is E-waste.?
What happen with E-waste.?
How we can prevent it.?

5. Disposal
•Consider that the average computer lifespan is
about 2 years (cell phones < 2 years)
– 10 years ago, the lifespan of a computer was
5 years
– between 1997 and 2004, it is estimated that
315 million computers became obsolete (and
were discarded, donated, or recycled)
•183 million computers were sold in
2004 (674 million cell phones!)

6. • New users in China (178 million by 2010)
and India (80 million by 2010) will require
the creation of new computers
• Disposal of these devices constituted 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 put all of it?

7. • Europe has outlawed using landfills for computer
components
• The US and Europe export a lot of e-waste to Asian
landfills (especially China even though China has
outlawed the importing of e-waste)
 in addition, incineration of computer components
leads to air pollution and airborne toxins.

8. Profiling Energy Usage For
Efficient Consumption
• What is Energy Usage Profile (EUP)?
• A simple Experiment
– A Simple Fluorescent bulb (60W)
– 1 Hour consumption: 0.06 kWh
– Cost
• $0.0897 per kWh
• $0.0054 per hour
• $47.15 for a year
– CO2 expulsion
• 23 lbs for 1 kWh
• 1208 lbs for a year

9. Reducing Energy Consumption
• Turn off the computer when not in use, even if
just for an hour
• Turn off the monitor when not in use (as
opposed to running a screen saver)
• Use power saver mode
– in power saver mode, the top item is not necessary,
but screen savers use as much electricity as any
normal processing, and the screen saver is not
necessary on a flat panel display

10. • Use hardware/software with the Energy
Star label
– Energy Star is a “seal of approval” by the
Energy Star organization of the government
(the EPA)
• Don’t print unless necessary and you are
ready
• Use LCDs instead of CRTs as they are
more power efficient

11. Approaches to GREEN
COMPUTING
•Algorithmic Efficiency
•Power Management
•Video Card
•Display
•Materials Recycling
•Telecommuting

12. Green Technologies
Power saving by link status
Wi-Fi Scheduler

13. Green Web Surfing
Greener Google Browsing: Blackle.com
Being Green with Yahoo!
Greener FireFox Surfing
Other Green Surfing Efforts
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14. To summarize
• Green computing has introduced a range of
equipments and technologies which help in
limiting the impact on the environment.
• Green computing is a novel and an innovative
trend in the world of computing which has
minimum or no impact on the environment.
• Use of EUPs help in different aspects of the
computing world help in recognizing the areas
for improvement.

15. Steps to Green
computing
• Develop a sustainable Green computing plan
• Recycle
•Make environmentally sound purchase decisions
•Reduce Paper Consumption
•Conserve energy