Kim Jensen, Group Senior Vice President & Regional Managing Director, Grundfos Asia Pacific Region Water & Wastewater Asia • January / February 2019 48 | OPINION A sia is home to 21 out of the 35 megacities of the world and is expected to house 60 per cent of the megacities by 2025. It is critical to ensure that these cities are planned keeping sustainability in focus, operate efficiently and ensure a high quality of life for residents. A growing area of focus for both the governments and the private sector in the region has been how to develop these smart cities and support the projected growth. Water and energy are two essential resources a smart city must deliver to develop sustainably. However, as cities urbanise and populations increase at an unprecedented rate, there is high pressure on these limited resources. Water demand in the region is forecasted to increase by 55 per cent by 2050. At the same time, energy resources are depleting at an equally drastic rate to meet rising needs, with energy demand projected to almost double in the region by 2030. The region is also facing widespread energy poverty, with almost a billion people still without access to electricity. To ensure sustainability of our resources and therefore, of our cities, we must recognise that addressing each resource in silos is not a long-term solution. Water and energy are intrinsically linked, and the increased demand for one can significantly affect the security of the other. Energy is required to make water resources available for municipal and industrial use, from pumping, transportation, treatment, and desalination. Water, in turn, plays a crucial role in the production of energy in the power processes and systems. How we conceive, plan and manage the cities of the future needs to recognise the inter-dependencies of the two commodities, known as the water-energy nexus. The water - energy nexus : Key to transforming megacities to smart cities By Kim Jensen, Group Senior Vice President & Regional Managing Director, Grundfos Asia Pacific Region Asiaisurbanisingatanunprecedentedrate,presenting a water-energy nexus on scale never seen before. But according to Kim Jensen, this nexus is the impetus cities need to become smart cities.