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Green Computing
By-
?SUPRIYA MONDAL(CSE-2)
Roll:-14300111116
?SURIT DATTA(CSE-2)
Roll:-14300111120

CONTENTS
? What is Green Computing
? Green Computing-Why?
? In a word
? Green Use, Green Disposal, Green Design, Green
Manufacturing
? Manufacturing of PC’s
? Green manufacturing
? Energy use of PC
? Energy star
? How to save energy while working on the internet ??
? How to go Green
? Disposal of components
? Green Disposal
? Example of Green computing: Thin Client
? Conclusion

What is Green Computing
? environmentally responsible use of
computers and related resources
? implementation of energy-efficient
central processing units (CPUs),servers
and peripherals
? reduced resource consumption and
proper disposal of electronic waste (e-
waste)

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)
– 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!

In a Word
? More directly, it means using computers or devices in
ways that save the environment, save energy and
save money.
4 aspects to be “Green”:
? Green use: Minimizing the electricity consumption of
computers and other devices
? Green disposal: Re-making or recycling unwanted
electronic equipments
? Green design: Designing energy-efficient computers,
servers, printers and other digital devices
? Green manufacturing: Minimizing waste during the
manufacturing of computers and other subsystems

? 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.
Manufacturing of PC’s

? Bamboo : is becoming increasingly popular for making casings for
computers and peripherals.
? Recyclable plastics : computers are constructed from non-
recyclable plastics ie recyclable polycarbonate resin.
? Eco-friendly flame retardant : there are flame retardant silicone
compounds available that are flame retardant and completely non-
toxic.
? Inventory management : reducing the quantity of both
hazardous materials used in the process and the amount of excess raw
materials.
? Volume reduction : removes hazardous portion of waste from non
hazardous portion.
Green manufacturing

Energy use of PC
? CPU uses 120 Watts
? CRT uses 150 Watts
8 hours of usage, 5 days
a week = 562 KWatts
? Energy use comes
from
Electrical current to
run the CPU,
motherboard, memory
running ,the fan and
spinning the disk,
monitor.

? 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.
Energy star

? 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
? Set Blackle as your homepage.
How to save energy while working
on the internet ??

How to go Green
? Turn off the computer when not in use, even if just
for an hour
? 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
? Switching from a locally hosted email system to cloud based email
system

? Europe has outlawed using landfills for computer components
? 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
? Toxic chemicals in electronics products can reach into the land
over time or are released into the atmosphere, impacting
nearby communities and the environment.
? This releases heavy metals such as lead, cadmium and
mercury into the air and ashes.
Disposal of components

? Reuse: donate your computer components to people who may not
have or have lesser quality computers.
? Reduce: 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.
Green Disposal

Example of Green computing: Thin Client
Thin Client:
? a regular computer
? do not have to have hard drives
? can run the software, with the help of a server
? connected to servers through network
? A Thin Client is a computer or a computer
program which depends heavily on some
other computer (its server) to fulfill its
traditional computational roles.

CONCLUSION
?While the performance and the breadth of
application is increasing, so awareness of the
cost & scarcity of the energy required to power
them, as well as the materials needed to make
them is necessary.
?Through more environmentally aware
usage(such as more effective power
management & shut-down during periods of
inactivity) and by adopting current lower power
technologies, computers can be made
significantly more energy efficient.
?Green Computing = Green Earth.

THANK YOU
“GO GREEN
SAVE OUR EARTH”

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Green computing

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