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Green Community –

4-zero Scheme

(an update)

A Talk at CUHKDate: 3 Oct. 2017

Dr Edward Yiu

Founder of REDBRIC

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• WWF-Hong Kong’s “Hong Kong Ecological Footprint Report 2017”:

• "Hong Kong people are living beyond the Earth’s limits. 3.9 Earths are needed if everyone lived the lifestyle of Hong Kong people."

HK Ecological Footprint

Biocapacity Ecological footprint

2012

Times

Hong

Kong

0.01 global ha per

person

6.7 global ha per person 670 times

World 1.7 global ha per

person

2.6 global ha per person 1.5 times

http://awsassets.wwfhk.panda.org/downloads/hong_kong_ecological_footprint_report_2014.pdf

• Energy (electricity, fuel)

• Water

• Food

• Materials

• ProductsResources

IN

• Consumption

• Waste

City• Water Drained

• Gas Exhausted

• Kitchen Wastes

• Recyclable Wastes

• Other Solid Wastes

Wastes OUT

Rely on a lot of Resources Inputs

and Disposition of Outputs

Traditional Linear City Model

Circular (Economy) City Model

https://www.ellenmacarthurfoundation.org/circular-economy/overview/concept

Symbiosis of Rural-Urban Coexistence

Rural – Urban Coexistence

Reduce and Reuse can better help than Recycle

Just Circular is NOT enough

Import Wastes

RecycleExport Wastes

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Zero Carbon Building HK

• Definition of Zero-Carbon (2nd level):

– Offset of operating energy consumed from the grid by on-site renewable energy generation with grid-feed-in

GHG emission reduction by on-site renewable

energy: 8,250 tonnes (over 50 years)

Zero means Self-Sufficient

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Zero Carbon City - UAE

• the Masdar initiative - a carbon-neutral, car-free, 1,482 acre sustainable city powered by the sun, in United Arab Emirates;

• The development project is expected to be completed by 2023, at an estimated cost of $22bn, designed by Norman Foster.

Commonly Owned = Commonly Indifferent

Who Cares about Community?

• Owners

• Designer

Building

• Residents

• Employees

• Visitors

• NGOs

• Government

Community• Government

• NGO

City

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Four-Zero Community Model

Individuals

Buildings

Community

City

Country / Global

Zero-material

Zero-water

Zero-food

Zero-waste

Zero energy

4-zero model

Zero Food and Zero Waste can only be

achieved in community level or above, as it

requires a lot of open space to handle

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A Trial of 4-zero Community

• A Zero-energy, Zero-water, Zero-food and Zero-waste Community:

• Yiu and Compos (2013) Sustainable Communities, ISSF 2014, or:

• http://ecyy.weebly.com/uploads/1/2/9/3/12935669/sustainable_building

s_2013.pdf

HKAEE Golden Award 2015

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Reduce Waste / Recycle

Reduction

Reuse

Recycle

15 items

Collect Organic

WastesCollect Rain

Water

Solar

Energy

Education &

Training

Information &

Measurements

Competitions

and Awards

Energy

Saving Farming Fertilizers

CleansingCleansing

Liquid

Sharing

Economy

Empowerment

& Cooperation

Green scape

Reduce Pollution

At Source

Reduce Waste

from Source

Residents’

Participations

Food Self-

Sufficiency

Reduce Inputs

Reduce Wastes

A Green Housing Estate Scheme

Zero Food

(Local Farms)

Urban Farms

• Farms on rooftop, open area and garden, vertical farms, interior farms

Foodscape

• Aquaponics, edible landscape, fruit trees*

Farmers’ Markets*

• Harvest Festivals*, Local Food Cuisines

Others

• Food consumption reduction competitions

Green Path and Green Corners

3 Types of Farming Area

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Farming Area

Prop Mgt

RentCommon

6-month Farmland Tenancy

(4-box)

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Farming and Food Landscape

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Others

• Plants Hospital / Orphanage

• Chinese Herb Garden

• Aquaponics

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Kids’ Farming and Planting

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➢ 43% landscape area (3 ha)

➢ No. of trees = 479 (absorb

11,017t CO2/yr)

➢ Vertical green walls

Greenery

➢Merge with Green belts and country parks

➢Biodiversity, including 60 species of birds, insects,

endangered toad and vulnerable frog

➢Old Valuable Trees, Hundred Years Old Heritage

Ecological and Heritage

Preservation

紅嘴藍鵲 (Blue Magpie), Urocissa

erythrorhyncha

Zero Waste

(Reduce Solid Waste 15%)

Sharing Economy

• Barter, Time-money notes, Sharing, Car pools*

Composting

• Kitchen Waste and Leaves Collections

Recycling

• 24 items, Producers’ Responsibility

• Fruit peels collection for cleansing agentsOthers

• Recycle Competition, Improve Air Quality

• Preserve Ecology, Social and Cultural Heritage

Leaves and Branches

Composting

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Kitchen Waste Composting

(Experimenting)

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Re-distribution of Food

(No Attempt to Do)

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Eco Enzyme from Fruit Peels

Reuse Plastic

Bottles

Reducing Wastes, Reducing Purchases

It saved

29,232 litres of

Cleansing Liquid

Sharing Economy

It saved

914 books

and 167 items

In 2014

➢Sharing: Books, Toys, Sports Equipment, Furniture, Baby Stuffs, Musical Instruments, Electrical Appliances

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27 Recyclable Items

Community Currency

(Stamps)

Recycle or Saving

Stamps

Vegetables

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Managed by

Property

Management

Company

➢Carbon Powder Cartridges

➢Rechargable Batteries

➢Construction Materials

Producer Responsibility

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Reduce 15% Solid Wastes in 2015Q1

Reduction of Wastes

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45

50

55

60

65

1 2 3 4 5 6 7 8 9 10 11 12 1 2 3

2014 2015

Daily Reduction of Solid Domestic Waste (in 660L Bins)

Zero Water

(Saved Water)

Save Water

• Recycle grey water, Aquaponics, Reduce water tank cleansing times

Other Sources

• Collect rain water for planting, Salt water for flushing*, repair leakage

Others

• Water saving competitions

Water Saving

• 2nd hand water tank (disposed from roof

top works)

• Rain water collection

• For watering

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Zero Energy

(Saved 40%)

Reduction of Electricity Consumption

• LED, Energy Efficient Motors, Water-cooling A/C*

• Auto Switch-off, PPO

Natural Renewable Energy

• Solar Panels, Wind Turbines*

Other Auxiliary Installations

• Bicycles for Charging, Tree Planting against Heat Island Effects

• Kids Plantation Day, Energy Saving Competitions

Energy Saving

➢LED

➢Transformer

➢Lift Control System

Solar Panels

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Smart Grids

• Smart grids allow selling electricity by users to the electricity grid of the district.

• Offsetting GHG becomes possible.

From 2004 to 2013, it saves 9,011,934 Kwh electricity (7,570t CO2)

It saves 47.5 % electricity consumption

Energy Saving

Green Kids

• http://www.hk01.com/%E7%A4%BE%E5%8D%80/53155/-

%E7%BD%AE%E5%AF%8C%E8%8A%B1%E5%9C%92-

%E6%A4%8D%E6%A8%B9%E7%A8%AE%E5%87%BA%E9%84%B0%E9%87%8C%E6%83%85-

%E5%B0%8F%E5%B1%85%E6%B0%91%E6%90%9E%E5%A2%9F%E5%82%B3%E7%92%B0%E4%BF%9D41

4-Zero Community Network

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• Facilitate to Connect More

Green Community:

– 4-zero Scheme

– Circular Economy

– Self-Sufficient

• If you are interested in promoting green

communities, you are welcome to join

our team

Waste-no-mall

43https://www.facebook.com/WasteNoMall/

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End

redbric.hk@gmail.com

www.facebook.com/redbric