The energy transition encompasses various aspects, including decarbonization and renewable energy, but one critical resource often overlooked is water. The water–energy nexus demonstrates the inseparable relationship between water and energy, necessitating water security in energy planning for sustainable energy systems.
Water plays a vital role in energy activities, such as hydropower generation, cooling power plants, and biofuel production. Conversely, energy is crucial for water extraction, treatment, distribution, and even desalination. Notably, the energy sector contributes approximately 10% of global freshwater withdrawals.
Climate change exacerbates this challenge, affecting power plant operations while increasing the urgency of decarbonization. Mexico illustrates these vulnerabilities, having experienced significant drought conditions affecting water availability for energy.
Interestingly, reducing emissions doesn’t automatically lower water consumption. Renewable technologies like wind and solar require less water compared to others like bioenergy or carbon capture. Moreover, as critical minerals for energy storage (e.g., lithium) are extracted, they too can pressure water resources.
Efficient energy policies can yield water benefits if technologies are chosen with emissions, performance, and water usage in mind. Notably, saving water equates to energy savings, as leakage leads to wasted resources already invested in treatment.
Wastewater treatment presents another opportunity, as it contains energy that can be recovered, potentially meeting much of the electricity needs of treatment facilities. As water scarcity poses risks to businesses, integrating water considerations into early project assessments is essential to mitigate operational and regulatory challenges.
With a growing competition for water—used significantly in agriculture—the energy transition will face mounting pressure. Effective responses must align energy and water planning, recognizing that water is a fundamental component of sustainable energy strategies.
Mexico has a notable opportunity to embrace an integrated approach, focusing not just on transitioning technologies but on creating a cohesive system that addresses environmental, economic, and social complexities, with water at its core.
