What is an aspect of water and energy now and into the future that is easily explained through and A4 poster?

An effective A4 poster could illustrate the relationship between water and energy through the concept of hydropower. The poster could feature a simple diagram showing how flowing water is converted into electricity, highlighting the renewable nature of hydropower as a clean energy source. Additionally, it could include statistics on its current contribution to global energy production and projections for future growth, emphasizing the importance of sustainable water management in energy strategies. Visuals, such as images of dams and turbines, would enhance understanding and engagement.