Past Events

Celebrating Earth Day 2021


Every 22 April, we celebrate Earth Day! It is the day we speak up for nature and make positive changes for our environment.  And don’t forget that 22 April 2021 marks the 51st anniversary of Earth Day!

In honor of it and as we go about celebrating it, Campus Sustainability Office will present two exclusive and limited-time offers to PolyU GreenCoin users.


Exclusive Offer #1 - Enjoy 50% off on selected GreenCoin rewards

From 19 to 30 April 2021 (Mon - Fri), you can enjoy 50% off when you redeem selected GreenCoin rewards on PolyU GreenCoin app. Items are on a first-come-first-served basis. Hurry while stocks last!

  • Collapsible 12 oz water bottle: 350 Coins 175 Coins

  • HK$ 50 green merchandise voucher: 250 Coins 125 Coins (All have been redeemed.) 

  • Aloe vera noodles 300g: 50 Coins 25 Coins (All have been redeemed.) 

Read the details of these rewards here.


Exclusive  Offer #2 - Earn double Coins at our event

If you attend the online sharing session - “Sustainable Eating – What, Why and How” on 27 April and complete the online post-event feedback form, you can earn 10 Coins (5 Coins + 5 bonus Coins) for use with the PolyU GreenCoin app!


Terms and Conditions

  • For current PolyU staff and students and registered GreenCoin users.

  • Redeeming Coins for e-coupons and/or other rewards is subject to a first-come-first-served basis while stocks last.

  • Users can get ten (10) Coins after attending and completing the online feedback form for the online sharing session on 27 April 2021.

  • The Coins will be credited to the user’s GreenCoin in due course. Email notification will follow afterwards.

  • The scope and details of this arrangement is subject to change at any time without prior notice.

  • When redeeming the collapsible 12 oz water bottle – only 1 random color will be given per one redemption and it is non-exchangeable and non-returnable. 

  • Coin records with the GreenCoin platform server are final.

  • Campus Sustainability Office (CSO) reserves the right of final decision in case of any disputes.

  • GreenCoin Terms and Conditions apply.


New to GreenCoin?

This is a PolyU home-grown campaign with a dedicated mobile app to reward your green actions on campus! Read more and download it now to join our GreenCoin community! Get more rewards at your fingertips!