"History teaches us that men and nations behave wisely once they have exhausted all other alternatives"

Abba Eban

"Then I say the Earth belongs to each generation during its course, fully and in its right no generation can contract debts greater than may be paid during the course of its existence"

Thomas Jefferson, September 6, 1789

Sustainable development is development that meets the needs of the present without compromising the ability of future generations to meet their own needs."

The Report of the U.N. Brundtland Commission, Our Common Future, 1987

Depending on the Covid-19 situation, the conference will be held in hybrid mode or full online mode.

If you plan to attend the conference on-site (limited number of seats available) make sure to read HEALTH AND SAFETY page (note the mandatory EU Digital COVID Certificate)
Almost 1100 abstracts received!



Abstract (archival paper) 
January 15, 2021
Abstract (archival paper) - extended 
February 15, 2021
Archival full paper  April 23, 2021
Abstract (conference paper) August 16, 2021
Abstract (conference paper in special session) July 30, 2021
Conference full paper September 22, 2021
Reduced fee for all papers (obligatory request)* May 21, 2021
Full fee for archival papers May 21, 2021
Full fee for conference papers in Special Session August 10, 2021
Full fee for conference papers September 10, 2021*
Sponsorship package fee  September 10, 2021
*Request for reduced fee
April 16, 2021
Membership waiver registration  June 15, 2021
Top up to regular (onsite) fee September 10, 2021*
Fee type changes, cancellations September 10, 2021
Final online digital proceedings October 25, 2021
Submission of papers to special issues depending on the journal


*Upon availability. Requests by e-mail to


Benchmarking the performance of cities across energy, water and environment systems
related metrics presents an opportunity to trigger policy learning, action, and cooperation to bring cities closer to sustainable development.