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Flagship Project Number: BATF-08-49
IT/ITeS Special Economic Zone, Delhi NCR, India greenspaces
INVITATION TO PARTICIPATE ININVITATION TO PARTICIPATE IN
Challenge
Flagship Project Number: BATF-08-49
IT/ITeS Special Economic Zone, Delhi NCR, India greenspacesGREENSPACES CHALLENGE GREENSPACES CHALLENGE –– CALL TO ACTIONCALL TO ACTION
• We aim to promote healthy living for one and all, reduce energy usage and protect environment
• We will demonstrate that by adopting certain parameters, energy consumption footprint of buildings can be reduced from 40% to 10%
• ‘GreenSpaces Challenge’ will use Collaborate Marketing tool to create awareness using internet
• The Challenge is about nurturing new and innovative ideas
• Pushing innovative ideas into reality
• Idea is to invite people to join a unified community, participate, submit ideas, comment and rate ideas presented by other participants
• The most rated proposals submitted will rise to the next level where our technical team & renowned research partners will review and short-list your ideas further
• Selected technologies will be implemented as best of category in our flagship project GreenSpaces and the winners will be associated with GreenSpaces as Technology partners and innovators
Flagship Project Number: BATF-08-49
IT/ITeS Special Economic Zone, Delhi NCR, India greenspacesGREENSPACES CHALLENGE GREENSPACES CHALLENGE –– CALL TO ACTIONCALL TO ACTION
List of opportunities for innovation for the Challenge - to reduce costs and /or improve efficiency
Ice Storage Bio reactorUnderfloor Air Displacement System Waste Water TreatmentGeothermal cooling InsulationLED Lamps Low Energy LaptopsRegenrative Elevators Green Data CentrePV Panels & Thermal Solar Fuel CellsDrinking Water - RO Treatment Access control
Façade BMSWorkstation with chairs SecurityCarpet Passive Cooling
Occupant Health, Productivity & Well being Indoor Air QualityPaints More Verticals to be added
Flagship Project Number: BATF-08-49
IT/ITeS Special Economic Zone, Delhi NCR, India greenspaces
OBJECTIVESOBJECTIVES
• Improve Energy efficiency
• Minimize Energy Consumption
• Reduce Cost
• Maximize Renewable Energy Use
• Achieve Project Vision
Flagship Project Number: BATF-08-49
IT/ITeS Special Economic Zone, Delhi NCR, India greenspaces
NEW TECHNOLOGY PARTNERSNEW TECHNOLOGY PARTNERS
We shall accept New Technology Partners in case there is improvement in energy and water efficiency, and/or reduction in cost and benefits to occupants
Flagship Project Number: BATF-08-49
IT/ITeS Special Economic Zone, Delhi NCR, India greenspacesINCENTIVE TO WINNING PARTICIPANTSINCENTIVE TO WINNING PARTICIPANTS
• Winners will become Technology partner of GreenSpaces for name and fame.
• Since it is a “Flagship Project” for Asia-Pacific Partnership (APP), Building and Appliance Task Force (BATF) on Clean Development and Climate, the winners will become part of an impressive and respected set of people known across the world
• ‘Flagship’ means projects & activities that illustrate and demonstrate the vision and objectives of Partnership. The portfolio includes full range of actions intended by Partnership – technology research & development, pilot projects, demonstration & deployment activities, skill enhancement and best practice dissemination www.asiapacificpartnership.org
• APP is a non-treaty agreement among Australia, Canada, India, Japan, China, South Korea, & USA working towards energy security, air pollution reduction & climate change to promote sustainable economic growth & poverty reduction
• Buildings and Appliances Task Force (BATF) is one of the 8 public-private sector task forces of the Partnership. Promotes best practices and demonstrates technologies & building design principles that increase energy efficiency
Flagship Project Number: BATF-08-49
IT/ITeS Special Economic Zone, Delhi NCR, India greenspaces
ChallengeFor information and registration, contact
Flagship Project Number: BATF-08-49
IT/ITeS Special Economic Zone, Delhi NCR, India greenspacesPROJECT VISION
• Buildings account for 40% of all the energy used by humans on the planet
• Energy demand is set to increase by 30% in the next 10 years
• 60% of human population will be living in cities in the next 15 years
• There is a growing preference for working and living in healthy & safe air-conditioned spaces
• By reducing the amount of energy used in buildings on the demandside, and generating & using renewable energy, one can significantly reduce carbon emissions, and earn carbon credits
• GreenSpaces will be meaningful for society as it will demonstrate that it is possible to reduce energy footprint from 40% to 10% while improving productivity & health of occupants
Flagship Project Number: BATF-08-49
IT/ITeS Special Economic Zone, Delhi NCR, India greenspacesPROJECT VISION
• Although GreenSpaces is a commercial development, the proposed Ideas, Innovation and Lifestyle changes are applicable and replicable in Retail, Hotels, Homes or in any other building, anywhere in the world
• It is a Cleantech /Greentech /IT application to buildings
• Is a world class project partnered with world class research labs & companies
• Project Overview
• GreenSpaces Project cost excluding land is USD 162MM
• The civil & MEP costs are about 50-50
• The MEP costs are, for this project, 58% higher than for a standard ‘A’ class building with a pay back of 6 years
• The CO2 savings per year are 36,000 tonnes on the demand side
• The above costs need to be reduced
Flagship Project Number: BATF-08-49
IT/ITeS Special Economic Zone, Delhi NCR, India greenspacesPROJECT VISION
• Energy savings per year are 41MM kWh (74.4% over standard ‘A’class building)
• Energy savings needs improvement
• Onsite renewable energy production is expected to be 1.6 MM kWh per year from PV, Bio reactors, Regenerative elevators, etc. Needs to be increased
• Lifestyle changes such as no jacket & ties in summer, ventilatedback & bottom ergonomic chairs, variable height tables, individual temperature controls
• Provide healthy & safe working place using natural bio-filtered indoor air that is of better quality than the ambient air
• The project seeks ideas for healthy living & being happy workingindoors
• Interiors that provide comfort & well-being of inhabitants
Flagship Project Number: BATF-08-49
IT/ITeS Special Economic Zone, Delhi NCR, India greenspacesPROJECT VISION
• Healthy food & happy living, outstanding air quality, reduction & recycling of waste, zero water discharge, reduction of water usage, availability of quality of drinking water, use of geo-thermal energy, vertical gardens, maintaining natural habitat for birds & enhancing the environment from Ornithological perspective using local biodiversity, energy conservation on demand side, onsite production of renewable energy, use of non carbon energy such as hydro-electric power & wind energy, meeting International specification & standards in regard to ventilation, lighting, temperature, air conditioning, fire & safety, with a full range of services such as crèche, medical, exercise, green data center, shopping, food courts, recreation, education & training, conferencing, are the key words for GreenSpaces for creating a fun working environment.
Flagship Project Number: BATF-08-49
IT/ITeS Special Economic Zone, Delhi NCR, India greenspacesPROJECT SYNOPSIS
Total Plot Area 8.25 Acres
Location & Access 6 Km south off Delhi on NH2 Latitude: 28 26’ 18” N, Longitude: 77 18’ 26” E
Ground coverage 40%Floor Area Ratio (FAR) 250%
Built Up Area 1.75 million sqft
No. of towers 4 interlinked towers (3 basements, 23 upper levels)Separate parking block (1 basement, 8 upper levels)
Facilities IT/ ITeS with Retail, Convertible Office Apartment, Medical, Recreation, Green Data Center
Floor heights 3.4 M (B2, B3), 6M (B1, Ground, Podium), 3.75 M (21 upper levels)
Occupancy 8,000 day time, 4,000 night timeCar parking 2,087 cars with charging points for battery powered cars
Public Transport Direct access to Metro Station Sector -27A, Faridabad
Floor plate 8,000 sqft each x 4 per level or 32,000 sqft per level
Flagship Project Number: BATF-08-49
IT/ITeS Special Economic Zone, Delhi NCR, India greenspacesPROJECT OVERVIEWPROJECT OVERVIEW
• The project is being developed by Ecotrust Capital Advisors headed by Mr. Kamal Meattle, CEO of Paharpur Business Centre (PBCTM-STIP)
• It is a campus style Technology / Innovation Park providing fully furnished offices with supporting amenities
• In June 2008 Bureau of Energy Efficiency (BEE) Govt. of India (GOI), Ministry of Power, after consultation with TERI recommended the Project to Ministry of Environment and Forests, New Delhi
• The Ministry of Environment and Forests proposed the development as a Flagship Project on 27 June 2008
• Approved on 30th October 2008 as FLAGSHIP project under Asia Pacific Partnership (APP), falls under Building and Appliances Task Force (BATF)
Flagship Project Number: BATF-08-49
IT/ITeS Special Economic Zone, Delhi NCR, India greenspacesPROJECT GOALSPROJECT GOALS
Flagship Project Number: BATF-08-49
IT/ITeS Special Economic Zone, Delhi NCR, India greenspacesGREENSPACES GREENSPACES ‐‐ ENERGY CONSERVATION MEASURES (ECM)ENERGY CONSERVATION MEASURES (ECM)
Insulated WallInsulated RoofFins & OverhangsLower lighting powerOccupancy SensorsDaylight SensorsVariable frequency drives on Air handling units, Secondary Pumps, Cooling towersChilling machines with high coefficient of performance (COP) Thermal Energy Storage systemUnder Floor Air Displacement SystemFree cooling during favorable outside conditionsPre cooling of fresh air by using dual wheelChange in operating set point at 25OCCooling towers with approach of 1OCSolar hot water
Flagship Project Number: BATF-08-49
IT/ITeS Special Economic Zone, Delhi NCR, India greenspacesSUPPORT FROM INTERNATIONAL LABORATORIESSUPPORT FROM INTERNATIONAL LABORATORIES
Three US National Laboratories:
• Lawrence Berkeley National Laboratory
• Oak Ridge National Laboratory
• National Renewable Energy Laboratory
Currently these laboratories are assisting us in reducing cost & / improve energy efficiency under grants from Department of Energy, USA as we are a reference Flagship project of the Asia Pacific Partnership – BATF-08-49 www.asiapacificpartnership.org
Flagship Project Number: BATF-08-49
IT/ITeS Special Economic Zone, Delhi NCR, India greenspaces
“creating India’s healthiest & most fun working environment”
PROJECT STATUS PROJECT STATUS –– TIME FRAMETIME FRAME
• APPLICATION TO HARYANA GOVT.
• LICENSE RECEIVED FROM HARYANA GOVT.
• APPLICATION FOR SEZ to GOI
• NOTIFICATION FOR SEZ RECEIVED
• SEZ RULES BY HARYANA GOVT
• FORMATION OF DESIGN TEAM
• CONCEPT STAGE
• SCHEMATIC DESIGN
• PRESENTATION OF DESIGN TO APP BOARD
• LAUNCH OF GREENSPACES CHALLENGE
• SCREENING & EVALUATION OF IDEAS SUBMITTED
• SELECTION OF NEW TECHNOLOGY PARTNERS
FROM NEW IDEAS SUBMITTED
• DETAILED DESIGN
• CONSTRUCTION DOCS
• START CONSTRUCTION
• READY FOR FITOUTS
• COMPLETION
•
2001
2004
2008
June 2008
September 2008
October 2008
October 2009
January 2010
April 2010
June 2010
September 2010
November 2010
December 2010
September 2013
December 2013
bijeta:
Have to change the page, Will get the info soon
bijeta:
Have to change the page, Will get the info soon
Flagship Project Number: BATF-08-49
IT/ITeS Special Economic Zone, Delhi NCR, India greenspaces
TECHNOLOGY / COST CHALLENGES
In order to reduce high cost & maximize energy efficiency we are still looking for better Ideas &
Technologies to help us achieve our Objectives as listed in the following slides.
The identified Challenges are divided into two categories namely Technology & Cost
Flagship Project Number: BATF-08-49
IT/ITeS Special Economic Zone, Delhi NCR, India greenspacesUNDERFLOOR AIR DISPLACEMENT SYSTEMUNDERFLOOR AIR DISPLACEMENT SYSTEM
Our Requirement:Permit individual temperature control for all the 8,000 workstations
Outside Condition: 107 Deg. F DB /75 Deg. F WB
Inside condition: 77 Deg. F DB / 55% RH
Floor Height 3.75 M (21 floors)
Benefits:Important to achieve minimum air-conditioning load, humidity and temperature control
ChallengeHigh cost
Success of the system in Delhi’s weather conditions
Known Alternatives:Passive cooling technologies like chilled beam
Flagship Project Number: BATF-08-49
IT/ITeS Special Economic Zone, Delhi NCR, India greenspaces
Our Requirement is as below or equivalent /better for very energy efficient equipment:8 No. 1600kg, 24 Persons (1.75 mps) Gearless Elevators with regenerative VVVF Drive
8 No. 1600kg, 24 Persons (2.5 mps) Gearless Elevators with regenerative VVVF Drive
16 No. 1600kg, 24 Persons (4 mps) Gearless Elevators with VVVF Drive
4 No. 20 persons (2.5 mps) Parking elevators with VVVF Drive
4 No. 1000kg Service Elevators (2.5 mps) Gearless Elevators VVVFDrive
4 No. 35◦ inclination 1.0 m wide Escalators with VVVF Drive
REGENERATIVE ELEVATORSREGENERATIVE ELEVATORS
For detailsclick here
Flagship Project Number: BATF-08-49
IT/ITeS Special Economic Zone, Delhi NCR, India greenspaces
Benefits:Elevators with regenerative capabilities will save energy
Expect to share energy savings with users of elevator by walking up
and using the elevators getting down
Challenges:High cost of Regenerative Elevators, long pay back period
Optimum utilization of power generated by elevators
Expectations:Reduced pay back period
Reliable & Local service support
REGENERATIVE ELEVATORS
For detailsclick here
Flagship Project Number: BATF-08-49
IT/ITeS Special Economic Zone, Delhi NCR, India greenspacesPV PANELS & THERMAL SOLARPV PANELS & THERMAL SOLAR
Our Requirement:
Solar Hot Water System for 100% hot water demand of 10,000 LPD
Hot water supply through solar hot water system for kitchen, health club & guesthouse.
Solar Power Generation of electricity using PV with no storage. Area available 12,000
sqm on roof top, 2,900 sqm on south side windows and the entire façade of the buildings
Challenges:Lower water temperature in Winter & Rainy Seasons
To reduce CAPEX for solar PV plant
Select the optimum system after comparing PV, Solar concentrators & others
Known Alternatives:Solar Concentrators, Fresnel solar collector. Co-generation
Flagship Project Number: BATF-08-49
IT/ITeS Special Economic Zone, Delhi NCR, India greenspacesGEO THERMAL COOLINGGEO THERMAL COOLING
Status till dateGeo thermal & water survey reports conducted
Approx. 900 TR condenser water cooling designed with Geothermal System
Well’s temperature
Hydrogeologoical study done
Path aheadUse Geothermal cooling for balance areas fed by conventional cooling tower
ChallengeHigh cost of Geothermal cooling compared to conventional cooling towers
Expertise on the designing of system
Increase the quantity of water usage by Geothermal cooling
Borewell # Depth (ft)
Reading Time
Water Temp
Ambient Temp
1 500 0900 32 20.52 460 0900 32.5 21.53 300 0900 29.5 22
Borewell Water Temperature Readings
For detailsclick here
Flagship Project Number: BATF-08-49
IT/ITeS Special Economic Zone, Delhi NCR, India greenspaces
Status till date
Bio-methanation to produce methane from on-site waste to power fuel-cells
Food waste
Human Excreta from occupants - 8,000 during day & 4,000 during night
Path ahead
To improve upon the Bio reactor technologyavailable from TERI (TEAM – TERI’s EnhancedAcidification and Methanation process)www.teriin.org
Challenge
Find Cost effective solution to use the gas for cooking or generating electricity using fuel cell
ONSITE BIO METHANATIONONSITE BIO METHANATION
Flagship Project Number: BATF-08-49
IT/ITeS Special Economic Zone, Delhi NCR, India greenspacesLED LAMPS & SUPER TLED LAMPS & SUPER T‐‐8 LAMPS8 LAMPS
Status till dateLED lighting fixtures available till date are not efficient as Super T8 lamps
No mercury content in LED lamp & higher lamp life of LEDs
Lighting study done
Path aheadUse of LED lights for workstation task lighting for 8,000 desks /rooms at night
Use of lux level cum motion based sensors for efficient lighting management& day lighting control
ChallengeFind supplier offering technology at an affordable cost
Thermal management of LED source lamps
Efficacy of LED lamps under typical office hour conditions
Find ways to dispose off the heat generated from lighting outside throughseparate ventilation
For detailsclick here
Flagship Project Number: BATF-08-49
IT/ITeS Special Economic Zone, Delhi NCR, India greenspaces
Status till dateCurrent proposed technology is Membrane Bio Reactor
Path aheadExploring Sustainable waste water management
technology using green plants
Use of green plants for creating a sustainable
ecosystem of micro-organisms for treating waste water
or from another source
ChallengeEvaluating other similar technologies
WASTE WATER TREATMENTWASTE WATER TREATMENT
Flagship Project Number: BATF-08-49
IT/ITeS Special Economic Zone, Delhi NCR, India greenspacesFAÇADE WORKS
Status till dateIntegrated insulated façade technology
Currently the average façade cost is estimated at 12
US $/ sqft.
Design, Supply & installation of an airtight façade as
indoor air quality in the building is being controlled by
purifying the ambient fresh air.
Path aheadAssistance in finding alternative cost effective
technology/ suppliers
For detailsclick here
Flagship Project Number: BATF-08-49
IT/ITeS Special Economic Zone, Delhi NCR, India greenspacesICE STORAGEICE STORAGE
Status till date
Provide 2,000 TRH Ice Storage to shave off peak demand on air-conditioning
Cooling to be drawn from Ice storage during the peak hours, & will be charged during low load hours
Estimated demand load variation, with fixed load 750TR for Data Centre, ranges from 1,500 TR to 2,144TR
Path ahead
Use of Ice inventory Management system which will assess the facility manager to measure the energy stored during & post charging process
To make use of stored energy during high electricity tariff rate or during mild load period
Challenge
High cost of meters & storage tanks
Flagship Project Number: BATF-08-49
IT/ITeS Special Economic Zone, Delhi NCR, India greenspacesPURIFIED DRINKING WATERPURIFIED DRINKING WATER
Status till dateDrinking water requirement – 25,000 LPD
Drinking Water Supply to all office occupants at designated locations
Separate treatment of water as per IS:10500 drinking water standards
Distribution of drinking water through dedicated network of pipes & pumps
Path aheadHigher efficiency RO based water treatment Plant
Generating water from ambient air
ChallengeTreatment of reject from RO plant with high TDS levels
High Cost of Stainless Steel tanks & RO plant
Find Alternative to the RO system to reduce cost
Flagship Project Number: BATF-08-49
IT/ITeS Special Economic Zone, Delhi NCR, India greenspacesGREEN DATA CENTREGREEN DATA CENTRE
Status till date• Tier III + Green Data Centre
• Rack area 15,000 sqft with electrical demand load of 2 MW
• Servers of all Building tenants will be housed in this area
Path ahead• Green data Center efficiency ratio i.e. Processing Power / Total Power used - including
UPS, Cooling and Processing should be less than 0.5
• Energy efficiency
• Water cooled air-conditioning
Challenge• Technology
• Reduction in cost & energy
Flagship Project Number: BATF-08-49
IT/ITeS Special Economic Zone, Delhi NCR, India greenspacesWORKSTATION WITH CHAIRWORKSTATION WITH CHAIR
Status till date
• Height adjustable, ergonomic design workstation (Facility Management controlled)
• Bottom and back ventilated chairs with adjustable height and hand rest
• Total requirement ~ 8,000 chairs & workstations
Path ahead
• Zero /Low maintenance
• Indoor Air Quality (IAQ) friendly, specifically low VOC
Challenge
• High Cost
Flagship Project Number: BATF-08-49
IT/ITeS Special Economic Zone, Delhi NCR, India greenspacesCARPETCARPET
Status till date
Zero VOC with recycled contents Carpets for entire office space
Total requirement ~ 60,000 Sqm
Carpet & Rug Institute (CRI) certified
Path ahead• Zero /low maintenance
• Easy /local recycling
• Indoor Air Quality (IAQ) friendly
Challenge• High Cost
• Local manufacturing
Flagship Project Number: BATF-08-49
IT/ITeS Special Economic Zone, Delhi NCR, India greenspacesPAINTSPAINTS
Status till date• Zero VOC
• Eco friendly
• Lead free, non-toxic paint
• Heat reflective paint for exteriors
Path ahead
• Indoor Air Quality (IAQ) friendly
Challenge
• Availability
Flagship Project Number: BATF-08-49
IT/ITeS Special Economic Zone, Delhi NCR, India greenspacesWATER PROOFING & INSULATIONWATER PROOFING & INSULATION
Status till date• High albedo roof membrane of thermoplastic-polyolefin with heat welded seams
including insulation, vapor retarder etc
• Entire roof & walls to be waterproofed and insulated
Path ahead• Eco-friendly
• Long lasting
Challenge• Cost & energy efficiency
Flagship Project Number: BATF-08-49
IT/ITeS Special Economic Zone, Delhi NCR, India greenspacesGREENSPACES GREENSPACES ‐‐ COMPONENTSCOMPONENTS
Flagship Project Number: BATF-08-49
IT/ITeS Special Economic Zone, Delhi NCR, India greenspacesSECTIONSECTION
Flagship Project Number: BATF-08-49
IT/ITeS Special Economic Zone, Delhi NCR, India greenspacesFLOOR SECTION FOR DAYLIGHTFLOOR SECTION FOR DAYLIGHT
3750
450
2325
16000
2325
Flagship Project Number: BATF-08-49
IT/ITeS Special Economic Zone, Delhi NCR, India greenspaces
TEAMTEAM
Flagship Project Number: BATF-08-49
IT/ITeS Special Economic Zone, Delhi NCR, India greenspacesProf. Charles L. Cooney Professor of Chemical & Biochemical Engineering at MIT
Mahendra K. Daga Chairman & Managing Director of Orient Ceramics and Industries Ltd.
Prof. Leon R. Glicksman Professor of Building Technology & Mechanical Engineering at MIT
Prof. Vishal Garg Assistant Professor & Head, Centre for IT in Building Sciences, International Institute of Information Technology, Hyderabad
David Gottfried President, WorldBuild Technologies, Inc. and Founder of the U.S. Green Building Council
James Hartzfeld Director, InterfaceFLOR, Co-Founder of the U.S. Green Building Council
Prof. Gilbert M. Masters Professor of Civil and Environmental Engineering (Emeritus) Renewable and Efficient Energy Systems at Stanford University
Prof. Ernest J. Moniz Co-Director of the Laboratory for Energy and the Environment at MIT and Director of the MIT Energy Initiative
Prof. William MoomawDirector of the Center for International Environment and Resource Policy at The Fletcher School of Law and Diplomacy and Professor of International Environmental Policy at Tufts University
Mark Runacres Senior Visiting Fellow at The Energy and Resources Institute (TERI), New Delhi and Former Minister and Deputy High Commissioner, British High Commission, India
Dr. Peter M. Senge Senior lecturer at MIT and founding chair of the SoL (Society for Organizational Learning) Council
Sandy Wiggins Chairman e3bank, Past Chair U.S. Green Building Council, Principal Consilience LLC
Dr. B. C. "Bill" Wolverton President, Wolverton Environmental Services, Inc., author of How To Grow Fresh Air, and retired NASA scientist
Dr. Jianshun "Jensen" Zhang Professor and Director, Building Energy and Environmental Systems Laboratory, Syracuse University
HONORARY ADVISORSHONORARY ADVISORS
Flagship Project Number: BATF-08-49
IT/ITeS Special Economic Zone, Delhi NCR, India greenspaces
Organization Country RoleLeighton Contractors Australia General ContractorPerkins+Will USA Principal ArchitectEdifice Consultants India ArchitectSpectral Services Consultants India MEP ConsultantWSP Cantor Seinuk USA Structural ConsultantEnvironmental Design Solutions India Energy ModellingEvans and Peck Australia Alliance FacilitatorCII/GBC India LEEDs FacilitatorEcotrust Capital Advisors India Financial AdvisorGodrej India LEEDs CommissioningTERI India GRIHA RatingTPS Consult UK Security ConsultantBillings Design Associates USA Façade ConsultantLAM Partners USA Lighting Consultant
CURRENT PROJECT DESIGN & CONSTRUCTION TEAMCURRENT PROJECT DESIGN & CONSTRUCTION TEAM
Flagship Project Number: BATF-08-49
IT/ITeS Special Economic Zone, Delhi NCR, India greenspacesCURRENT TECHNOLOGY PARTNERSCURRENT TECHNOLOGY PARTNERS
Flagship Project Number: BATF-08-49
IT/ITeS Special Economic Zone, Delhi NCR, India greenspaces
Visit us at http://greenspaces.in/blog/gs‐challenge/