Are there any side effects of hydroelectricity?

Yes, hydroelectricity can have several side effects. These include ecological impacts such as changes in water quality and flow, which can affect aquatic habitats and fish populations. Additionally, the construction of dams can lead to the displacement of local communities and wildlife, as well as changes in sediment transport that can alter river ecosystems. Furthermore, large reservoirs can contribute to greenhouse gas emissions from decomposing organic matter.