This document discusses approaches to green computing including virtualization, power management, and recycling electronics. It specifically examines the green web browsing site Blackle, which aims to save energy by using a black background and gray font. Testing found that Blackle used 17.7W less power for a CRT monitor and 3.8W less for an LCD monitor compared to Google. The document concludes that green computing is important to satisfy growing computing demands while reducing environmental impact through more efficient resource use and design.

1. GreenComputing
By: Vaibhav D. Sawant
New Roll No : 19
Old Roll No: 35

2. Quick Recap
˚ What is green computing?
˚ Why green computing and why go green?
˚ Reasons for adopting green solution.
˚ Approaches to Green Computing

3. Approaches to Green
Computing
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˚
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Virtualization
Algorithm Efficiency
Power Management
Power Supply
Display
Storage
Material Recycling
Telecommuting

4. Role Of IT Vendors
˚ Apple
˚ Google
˚ Nokia recycling
˚ Dell’s Asset
Recovery

5. Disposal and recycling of IT
equipment
IT products
• Production of IT products involves
multiple toxins
and energy
―Semiconductors
―Displays
―Printers
―Batteries
• Energy involved in manufacturing an
IT product is greater than the product
will use in its lifecycle

6. Recycle electronics
• 20 – 50 million tons of computer equipment and
cell phones discarded in landfills each year
(putting mercury and lead into the environment)
• Estimates of PCs and cell phones recycled
range from 1 – 12%.
• Recycling electronic equipment can help
prevent 70% of toxic waste in landfills.

7. Even More Ways to be Green
Consider a “Green” Managed Hosting/Colocation Facility
˚
1.GreenHouseData.com
˚
2.Rackspace.com
˚ Consider taking steps to extend the life of the current equipment vs.
buying new
˚ Replace single function devices with multifunction devices
˚ Consider following LEED certification guidelines

8. Green
Web
Surfing
Greener Google Browsing: Blackle.com
Donates almost 100% of its
profits from Google Search
to various environmentalthemed causes.

9. Implementation of Green
Computing

10. Blackle
˚ 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.
˚ The concept behind Blackle is that computer monitors
can be made to use less energy by displaying much
darker colors. Blackle is based on a study which tested
a variety of CRT and LCD monitors.

11. Blackle
˚ There is dispute over whether there really are any
energy saving effects, especially for users of LCD
screens, where there is a constant backlight.
˚ This concept was first brought to the attention of Heap
Media by a blog post, which estimated that Google
could save 750 megawatt hours a year by utilizing it for
CRT screens.
˚ The homepage of Blackle provides a count of the
number of watt hours claimed to have been saved by
enabling this concept.

14. Blackle
˚ Is the search page, Blackle.com, really an energy
efficient alternative to Google?
˚ The theory is websites with black background save
energy. That claim is based on an assumption that "a
given monitor requires more power to display a white
(or light) screen than a black (or dark) screen."
˚ Is this a blatant green washed marketing ploy, or an
earnest energy saving tweak for something we use
every day?

15. Testing the internet: where monitor power
consumption is potentially wasted
˚ To find out, PCSTATS hooked up an Extech Power
Analyzer to a 19" CRT and a 19" LCD.
˚ One explorer window, set to full screen (1280x1024)
was opened to each of the following websites.
˚ Blackle's claims appear to hold water, although the
difference is just 17.7W and 3.8W for CRT and LCD
respectively. What that adds up to over the course of a
year, for every second you spend doing a search on
Google is massive.

16. The resulting monitor power consumption
to display a webpage fluctuated as shown
below:
19" CRT ADI
Microscan
19" LCD Samsung
192MP
Google.com
83.5 Watts
38.6 Watts
Blackle.com
65.8 Watts
34.8 Watts

17. Blackle
˚ Expanding on the Blackle.com vs. Google.com
question further, how many website designers out
there have considered the electrical impact of their
creations on monitor power consumption?
˚ Before comparing Google vs. Blackle we wouldn't
have thought that the colours used in web design
would have a significant impact on energy consumed
by the display device.

18. Blackle
˚ Yet faced with the lower energy usage that
Blackle.com proves is possible with crafty use of dull
dark colours and stationary images, we got to
wondering.
˚ What is the carbon footprint of some of the most
popular websites out there? How about websites that
focus on environmentally friendly design, products,
lifestyles and energy sources? Are there websites
which disseminate this timely and important
information using an power sensitive colour scheme?

19. Search Engines - Measuring Website
Energy Efficiency
Website
19" CRT ADI Microscan
19" LCD Samsung 192MP
E66
Blackle.com
65.8 W
34.8 W
Google.com
83.5 W
38.6 W
Live.com
82.7 W
38.5 W
Yahoo.com
81.2 W
38.9 W
Ask.com
81.6 W
38.4 W
AOL.com
81.6 W
38.8 W

20. Monitor Power Consumption - Black &
White
19" CRT ADI
Microscan E66
Color
Reference - full
screen white
Reference - full
screen black
19" LCD Samsung
192MP
85.1 W
38.4 W
63.6 W
34.0 W

21. Rules of Thumb
˚ There are a great many web designs on the internet
and from the simple monitor power consumption tests
shown here, a few general rules of thumb seem to
hold:
A) LCD monitors consume a lot less power compared
to CRT displays and are the better, energy
efficient monitor choice.
B) Websites with darker colours tend to cause the
monitor to consume less power.
C) Flash and other moving bits cause monitor power
draw to increase.
D) The worst result was a solid white screen (~85.1W
on CRT / 38.4W on LCD)
E) The best result is a solid black screen (~63.6W on
CRT / 34.0W on LCD)

22. Future Of Green Computing
˚ The plan towards green IT should include new
electronic products and services with optimum
efficiency and all possible options towards energy
savings.

23. Conclusion
˚ So green computing is a mindset that asks how we
can satisfy the growing demand for network computing
without putting such pressure on the environment.
˚ There is an alternative way to design a processor and
a system such that we don't increase demands on the
environment, but still provide an increased amount of
processing capability to customers to satisfy their
business needs.
˚ Green computing is not about going out and designing
biodegradable packaging for products. Now the time
came to think about the efficiently use of computers
and the resources which are non renewable.

24. Thank You.