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Rent a
Dispenser
Rent a
Dispenser
Be a Campus Green Hero Online Quiz
Join the "Be a Campus Green Hero" Online Quiz and challenge yourself with fun questions on clean recycling, sustainability practices, and GreenU Reward Scheme!
Q1
Q2
Q3
Q4
Q5
Q6
Q7
Q8
Q9
Q10
Q11
Q12
Q13
Q14
Q15
Q16
Q17
Q18
Q19
Q20
Q1
How many sets of smart recycling bins are on the HKU Main Campus? (As of 17 March 2026)
A. 1
B. 2
C. 3
D. 4
Answer: C
There are 3 sets of smart recycling bins on HKU’s main campus, located at:
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LG2/F, K.K. Leung Building (outside lift lobby)
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G/F, Hui Oi Chow Science Building (outside Innovation Wing)
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G/F, Central Podium Levels, Centennial Campus
Q3
Where on campus can you find a smart recycling bin for recycling glass bottles?
A. G/F, Central Podium Levels, Centennial Campus
B. LG2/F, K.K. Leung Building
C. G/F, Jockey Club Building for Interdisciplinary Research
D. G/F, Hui Oi Chow Science Building
Answer: A
The smart bin at the Centennial Campus accepts paper, metal, glass bottles, and other plastics.
Q2
Which of the following are the features of HKU’s smart recycling bins?
i) Operate 24 hours a day
ii) Earn GreenU points for reward redemption
iii) Have sensors that monitor fill levels for efficient collection
iv) Automatically record the weight of deposited recyclables
A. i, ii, and iii only
B. i, iii, and iv only
C. ii, iii, and iv only
D. All of the above
Answer: D
The smart bins are self-service and feature 24-hour access, fill level sensors, automatic weight recording, and earn GreenU points for reward redemption!
Q4
Which of the following items are accepted at the re Kiosk for recycling?
i) Carton Boxes
ii) Milk Cartons
iii) Portable Power Banks
iv) Vinegar Bottles
A. i, ii, and iii only
B. i, iii, and iv only
C. ii, iii, and iv only
D. All of the above
Answer: D
re Kiosk accepts Paper, Tetra Pak, Rechargeable Battery and Glass Bottle.
Q5
What is the correct sequence for using a smart recycling bin to earn GreenU Points?
i) Start recycling your materials
ii) Press the button on the bin to begin the session
iii) Scan your HKU Access Code from the HKU App
A. i, ii, iii
B. ii, i, iii
C. ii, iii, i
D. iii, ii, i
Answer: C
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Press the button to start the session
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Scan your HKU Access Code
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Start recycling
Q6
From April 2024, which disposable plastic tableware items are banned for takeaway customers?
i) Expanded polystyrene (EPS/foam) tableware (including cups, bowls, and food boxes)
ii) Plastic forks, knives, and spoons
iii) Plastic straws
iv) Plastic cups, bowls, and food boxes
A. i and ii
B. i, ii and iii
C. iii only
D. All of the above
Answer: B
From April 2024, the tableware items in categories (i), (ii), and (iii) are banned and should not be sold or provided by restaurants for dine-in or takeaway services.
While the tableware items in categories (iv) are banned and should not be provided by restaurants for dine-in services only.
Q7
According to the Environmental Protection Department, which two materials were the 2nd and 3rd largest components of Hong Kong landfill waste in 2024?
i) Food waste
ii) Plastics
iii) Metals
iv) Paper
A. i and ii only
B. ii and iii only
C. ii and iv only
D. iii and iv only
Answer: C
Plastics and paper were the 2nd and 3rd largest components of municipal solid waste in 2024, with food waste being the largest.
Q8
In 2024, how much domestic food waste did each person in Hong Kong dispose of every day, excluding commercial and industrial food waste?
A. 0.15 kg
B. 0.27 kg
C. 0.58 kg
D. 1 kg
Answer: B
In 2024, the total amount of municipal food waste was 3,001 tonnes. Of this, domestic food waste accounted for 1,996 tonnes, while industrial and commercial food waste amounted to 1,004 tonnes. Based on the Hong Kong population of 7.4 million, the daily average domestic food waste per person was 0.27 kg in 2024.
Q9
Which of the following is a recommended reusable choice for a B.Y.O. drink container?
i) A reusable plastic bottle
ii) A container made from coffee grounds
iii) A biodegradable paper cup
iv) A stainless‑steel insulated bottle
A. i and ii only
B. ii and iii only
C. i, ii and iv only
D. All of the above
Answer: C
A biodegradable paper cup is not considered reusable.
Q10
Which of the following are the measures on campus that support B.Y.O.?
i) Takeaway Discounts at some catering outlets when using your own containers
ii) A reusable tableware rental service at Bijas Vegetarian Restaurant
iii) A “Borrow A Cup” system at Starbucks in the Composite Building
iv) Free disposable cutlery is available at all cafés
A. i, ii, and iii only
B. i, iii, and iv only
C. ii, iii, and iv only
D. All of the above
Answer: A
Disposable cutlery is not reusable and not free.
Q11
Which of the following materials are suitable choices for reusable cutlery?
i) Stainless steel
ii) Wood
iii) Bamboo
iv) Silicone
A. i, ii, and iii only
B. i, iii, and iv only
C. ii, iii, and iv only
D. All of the above
Answer: D
Stainless steel, wood, bamboo and silicone are durable and washable.
Q12
Which of the following can help to reduce the use of single-use tableware on campus?
i) Using a personal reusable bottle or cup when buying takeaway coffee or beverages
ii) Bringing your own container for buying takeaway meals
iii) Use your own cutlery for takeaway meals at hall or in office
iv) Bringing your own shopping bag to the campus supermarket
A. i, ii, and iii only
B. i, ii, and iv only
C. ii, iii, and iv only
D. All of the above
Answer: D
All these can help to reduce the use of single-use tableware on campus.
Each action involves reducing waste by choosing reusable alternatives
(like bottles, cutlery, containers, or bags) instead of accepting disposable items.
Q13
Which of the following are the acts to achieve the “Ultimate Target” of a Zero Waste Lifestyle?
i) Reduce unnecessary consumptions or purchasing
ii) Repair items before replacing them
iii) Reuse what you already have before buying new
iv) Recycle usable resources from waste
A. i, ii, and iii only
B. i, iii, and iv only
C. ii, iii, and iv only
D. All of the above
Answer: D
All the acts can lead to the “Ultimate Target” of a Zero Waste Lifestyle
Q14
How many GreenU Points can you earn for recycling 1.5 kg of plastic bottles at the campus smart recycling bins?
A. 80 points
B. 100 points
C. 120 points
D. 160 points
Answer: C
1 kg of plastic bottles earns 80 points, while 1.5 kg of plastic bottles earns 120 points.
Q15
During a “Double Points” promotion, how many GreenU Points do you earn for recycling 4 kg of paper at the campus smart recycling bins?
A. 20 points
B. 40 points
C. 80 points
D. 160 points
Answer: C
Normal: 1 kg → 10 points, 4 kg → 40 points, Double Points → 80 points
Q16
How many GreenU Points are needed to redeem a 4,500 Carbon Wallet Points e-coupon in the GreenU Reward Scheme?
A. 600 points
B. 900 points
C. 2,250 points
D. 4,500 points
Answer: B
900 GreenU Points = 4,500 Carbon Wallet points
Q17
Which of the following descriptions of the GreenU Reward Scheme are correct?
i) Any HKU student or staff with a valid portal account can join
ii) Earned points expire every 6 months
iii) GreenU Points are transferable or saleable
iv) GreenU Points remain valid as long as your HKU portal account is active
A. i and ii only
B. i and iv only
C. i, iii, and iv only
D. All of the above
Answer: B
GreenU Points remain valid for redemption as long as your HKU portal account is active.
Points are forfeited upon graduation or contract termination.
Q18
To earn GreenU Points at the campus smart recycling bins, what is the minimum weight required per transaction?
A. 0.1 kg
B. 0.2 kg
C. 0.5 kg
D. 1.0 kg
Answer: A
A minimum of 0.1 kg is required per transaction to register and earn points.
Q19
Since which year has HKU’s Disposable Plastic Free Campus Policy been in effect?
A. 2018
B. 2019
C. 2020
D. 2021
Answer: C
HKU implemented its Disposable Plastic Free Campus Policy in September 2020.
Q20
Which of the following items are banned under the HKU’s Disposable Plastic Free Campus Policy?
i) Plastic bags
ii) Plastic bottles of 1 litre or less in volume
iii) Plastic cutlery
iv) Plastic items used in health-related or other emergency situations
A. i and ii only
B. ii and iii only
C. i, ii, and iii only
D. All of the above
Answer: C
Plastic items used in health‑related or emergency situations are explicitly allowed as exceptions.
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