Water is an essential resource for generating energy, from hydropower to cooling thermal power plants. However, the energy sector is also one of the largest water consumers. This problem can be solved by making investments in the water-energy nexus. Businesses can cut costs and perform better for the environment by optimizing the use of water in energy production, such as by switching to dry cooling systems from wet cooling that uses a lot of water. Investors can benefit from cutting-edge technologies like water treatment for reusing in power plants. Investments in water and energy companies that place a high priority on sustainability can generate profits while encouraging prudent resource management.