The document discusses green computing, which aims to reduce the environmental impact of computing through more efficient use of computing resources and reducing pollution from manufacturing and disposal of electronics. It notes that computers use a lot of energy and lists ways to reduce energy usage such as using power saving modes, turning off monitors and computers when not in use, and choosing more efficient LCD monitors over older CRT monitors. The document also discusses reducing hazardous materials used in manufacturing and better disposal and recycling of electronics to reduce pollution and toxicity.

1. Neha Sahni

2. • Green computing is the practice of using
computing resources efficiently.
• Designing , manufacturing and disposing
Computer, servers with no impact on the
environment.
• To reduce the use of Hazardous materials,
maximize energy efficiency during product’s
lifetime.

3. Why?????
 Computer energy is often wasteful
Leaving the computer on when not in use
 Printing is often wasteful
How many of you print out your emails or meeting agendas
 Pollution
Due to manufacturing, packaging, disposal techniques
 Toxicity
Due to toxic chemicals involved in the manufacturing.

4.  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.

5.  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.

7.  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, memor
y
running the fan and spinning
the disk.
monitor

8.  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

9.  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.

10.  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.

11. 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.

12.  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.

13.  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.