The linkages between water and energy consumption are significant. To produce energy, water is needed and, likewise, the provision and treatment of water requires the consumption of energy, in particular of electricity (ca. 60%). Reports and analysis demonstrated that the water sector is becoming more energy-intensive, while the energy sector is increasing its water-intensity.
The project Zagreb Energy Efficient City (ZagEE) lead to the realization of energy savings by implementing economically sound and energy efficient technologies and measures to public lighting and buildings (90% of the buildings were classified below F energy class). The project was developed under the Intelligent Energy Europe (IEE) programme.
The capital of Colombia, Bogotá, has implemented an efficient and innovative bus system for urban transport using a Private Public Partnership (PPP). The public sector, represented by the TransMilenio S.A., planned the project with funding responsibilities and daily supervision. The private sector participated by involving companies in the bidding process for awarding buses to upgrade.
In the city of Sonsonate, El Salvador, the public lighting upgraded its light-emitting diode (LED) technology by adding a General Electric (GE) system. This is a conjoint project between AES El Salvador, UNITAPE LATINOAMERICA and GE. This is an example of a project developed and implemented through a partnership between local public sector and private energy companies.
Smart Green Apartments (SGA) is a free programme provided by the City of Sydney to guide multi-apartment buildings to decrease energy and water consumption and waste outputs through free audits and information on government rebates. The project has won the 2017 Green Globe Award for excellence and innovation in design, construction, retrofitting and management of existing or new buildings, precincts and tenancies.