In depth presentation on Green Technology

1. By: Ashima Datta
3712047
SRI VENAKTESWARA COLLEGE

3. WHAT IS GREEN TECHNOLOGY
• YESTERDAY - The word technology comes from two Greek
words, techne and logos. Techne means art, skill, craft, or the way
by which a thing is gained. Logos means word. So, literally,
technology means words or discussion about the way things are
gained.
• TODAY- term “Technology" refers to the application of
knowledge for practical purposes.
GREEN TECHNOLOGY
Green technology acts to reduce contaminants
and harmful processes through directly
counteracting them, or through altering the
conditions that create them.
It is the technology which is environmentally
friendly, developed and used in such a way so
that it doesn’t disturb our environment and
conserves natural resources

4. Old wine in a new bottle?
• Since ancient times, people have harnessed the winds energy. Over 5,000
years ago, the ancient Egyptians used wind to sail ships on the Nile River.
By 200 B.C., simple windmills in China were pumping water, while vertical-
axis windmills with woven reed sails were grinding grain in Persia and the
Middle East The earliest known windmills were in Persia (Iran).
ANCIENT PERSIAN VERTICAL AXIS WINDMILLS

5. GRAY WATER TREATMENT IN 956BC
• The people of Ancient Jerusalem used this system too, they were at a high
elevation, and to get water they would use a series of pipes, tunnels, and
aqueducts to transfer water from near by mountains. They would then save
the clean waste water, and transfer that water out to be used to irrigate the
land around them. That is why, I think that gray-water plumbing is more Eco-
friendly than modern day irrigation, as it does not use extra water or
electricity to irrigate surrounding land.

6. ADVANCED GRAY WATER TREATMENT

7. Located in Southwestern Colorado, the Mesa Verde National Park
cliff dwellings highlight the southern-facing cliff villages that were
formerly inhabited by the ancient Anasazi culture in 600 – 1300
A.D.
PASSIVE SOLAR DESIGNS

9. SIMILARLY
1. Renewable Geothermal Heat Energy - Ancient Roman Thermal Baths
2. Hawa Mahal – natural air conditioned surrounding

10. What are the goals of green
technology?
• Sustainability - meeting the needs of society in ways that can continue
indefinitely into the future without damaging or depleting natural
resources. In short, meeting present needs without compromising the
ability of future generations to meet their own needs.
• "Cradle to cradle" design - ending the "cradle to grave" cycle of
manufactured products, by creating products that can be fully reclaimed
or re-used.
• Source reduction - reducing waste and pollution by changing patterns of
production and consumption.
• Innovation - developing alternatives to technologies - whether fossil fuel
or chemical intensive agriculture - that have been demonstrated to
damage health and the environment.
• Viability - creating a center of economic activity around technologies and
products that benefit the environment, speeding their implementation
and creating new careers that truly protect the planet.
•

12. WHAT IS GREEN CHEMISTRY?
 Green chemistry, also called sustainable chemistry, is a philosophy of
chemical research and engineering that encourages the design of products
and processes that minimize the use and generation of hazardous
substances.

13. PRINCIPLES OF GREEN CHEMISTRY

14. Some Examples

15. Green nanotechnology
• Nanotechnology - is the manipulation of matter on an atomic,
molecular and supramolecular scale.
• GREEN NANOTECHNOLOGY – use of nanotechnology to
enhance the environmental sustainability of processes
producing negative externalities. It also refers to the use of
the products of nanotechnology to enhance sustainability.
it includes
Making green
Nano products
Using Nano products
in support of
sustainability.

16. BASIC OBJECTIVES OF
NANOTECHNOLOGY
Using eco-friendly
materials
Use of less energy
during manufacture
Ability to recycle
after use

17. APPLICATIONS OF NANOTECHNOLOGY
• Restores the soil
• Water purification
• Hydrogen and solar storage
• Stops indoor pollution by paints
• Nano photonics

18. • Nano scale iron – for contaminated soil
BACK

19. BACK

20. BACK

21. • Thanks to nanophotonics, the study of light's behavior at the nanoscale,
nanotechnology has your energy needs covered at home and in the office
as well. Researchers have developed windows, paints and film coatings
that they can "tune" to reflect or transmit specific wavelengths of solar
radiation, including the infrared energy that we experience as heat. It's
like turning your whole house into a sun shade during the summer and a
space blanket in the winter.
LET’S TUNE OUR WINDOWS
BACK

22. solar photocatalyt using
titanium dioxide nanoparticles
can degrade pollutants like
volatile organic compounds
and nitrous oxides and
consequently has been used
in cement and commercial
paints. Paints enriched with
nano titanium dioxide,
replacing organic biocides, are
used to keep the surfaces of
buildings clean.
BACK

23. GREEN

24. • Green Building, also known as green construction or
sustainable building, is the practice of creating structures and
using processes that are environmentally responsible and
resource-efficient throughout a building's life-cycle.
SITING AND
DESIGN
CONSTRUCTION OPERATION MAINTENANCE RENOVATION DECONSTRUCTION
ECONOMY UTILITY DURABILITY AND COMFORT

25. BENEFITS NEGATIVES
1. Lower electric and water utility
costs
2. Environmentally effective use
of building materials
3. Enhanced health and
productivity
4. Long-term economic returns
5. Reduced environmental
impact
HIGH COST
(but in the long run it gets covered)

32. GREEN ENERGY
• Renewable energy comes from natural
sources that are constantly and sustainably
replenished.

33. • WIND ENERGY - Wind energy costs about the same as electricity from new coal-
and gas-fired power plants. And it's pollution-free.
• SOLAR ENERGY - Inexhaustible and cheaper than ever, solar energy now powers
everything from portable radios to homes, stores and neighborhoods..
• BIOGAS ENERGY - Farmers can reduce pollution and generate their own heat and
electricity by converting animal waste into a clean-burning gas.
• GEOTHERMAL ENERGY - Reservoirs of steam and hot water beneath the earth's
surface hold enormous potential as a renewable energy resource.
• HYDROPOWER - Energy from moving water is the largest source of renewable
electricity in the United States. While water is a renewable resource, rivers
themselves are not.
• OFFSHORE WIND, WAVE, AND TIDAL ENERGY - Offshore renewable energy holds
great promise, and can be developed in a way that protects our ocean resources.

34. Green computing, Green ICT as per IFG International Federation of Green
ICT , is the study and practice of environmentally sustainable computing
or IT.
This can include designing, manufacturing, using, and disposing of
computers, servers, and associated subsystems—such as monitors,
printers, storage devices, and networking and communications systems
— efficiently and effectively with minimal or no impact on the
environment.
In 1992, the U.S. Environmental Protection
Agency launched Energy Star, a voluntary
labeling program that is designed to promote
and recognize energy-efficiency in monitors,
climate control equipment, and other
technologies. This resulted in the widespread
adoption of sleep mode among consumer
electronics.

35. SUSTAINABILITY SCALE
Can something that is unsustainable be altered to
become more sustainable?
Choose an unsustainable activity and explain
how it could be made more sustainable.

37. Carbon footprints
A measure of the total amount of carbon dioxide (CO2)
and methane (CH4) emissions of a defined population, system or
activity, considering all relevant sources, sinks. Calculated
as carbon dioxide equivalent (CO2e) using the relevant 100-
year global warming potential by Wright, Kemp and Williams in
Carbon management journal

38. How to measure carbon footprints?
• CO2e, or carbon dioxide equivalent, is a standard
unit for measuring carbon footprints

39. Sources of carbon footprints

42. CARBON LABELLINGS, ECO LABELS
AND GREEN CERTIFICATES

43. CAP AND TRADING SYSTEMS

44. CONCEPT OF CARBON OFFSETS

45. HOW TO REDUCE YOUR CARBON
FOOTPRINTS?
Your turn to suggest some ways

46. An eco-city is a city built off the principles of
living within the means of the environment. The
ultimate goal of many eco-cities is to eliminate
all carbon waste, to produce energy entirely
through renewable sources, and to incorporate
the environment into the city

47. HOW IT ALL BEGAN
The concept of the “eco-city” was born out of
an organization named “Urban Ecology.” The
group was founded by Richard Register in
Berkeley, California in 1975,
I want to reconstruct cities so that they
are in balance with nature
They worked to plant trees along the main
streets, built solar greenhouses, and worked
within the Berkeley legal system to pass
environmentally friendly policies . They also
took the movement further and hosted the
first International Eco-City Conference in
Berkeley, California in 1990

48. Criteria for ECO CITY

49. • Operates on a self-contained economy, resources needed are found locally
• Has completely carbon-neutral and renewable energy production
• Has a well-planned city layout and public transportation system that makes the
priority methods of transportation as follows possible: walking first, then
cycling, and then public transportation.
• Resource conservation—maximizing efficiency of water and energy resources,
constructing a waste management system that can recycle waste and reuse it,
creating a zero-waste system
• Restores environmentally damaged urban areas
• Ensures decent and affordable housing for all socio-economic and ethnic groups
and improve jobs opportunities for disadvantaged groups, such as women,
minorities, and the disabled
• Supports local agriculture and produce
• Promotes voluntary simplicity in lifestyle choices, decreasing material
consumption, and increasing awareness of environmental and sustainability
issues

50. Sino-Singapore Tianjin Eco-city

51. Auroville- INDIAN ECO CITY

54. BENEFITS OF ECO CITY
1. HEALTHY ENVIRONMENT
2. CULTURAL DIVERSITY
3. SOCIAL EQUITY