Hydropower dams can block fish migration routes and fragment aquatic habitats, leading to a decline in biodiversity.

Increased efficiency of turbines is a technological advancement that helps to improve the performance of hydropower plants, rather than a challenge.

Hydropower reservoirs can release methane, a potent greenhouse gas, as organic matter decomposes in the absence of oxygen.

Displacement refers to the forced relocation of people and communities due to the construction of a hydropower dam or other infrastructure projects.

While hydropower dams can provide flood control benefits, they are not the only or most effective means of flood control.

The intermittency of water flow in hydropower can lead to reduced electricity generation, especially during dry seasons or periods of low rainfall.

Hydropower dams can have negative impacts on water quality, such as increasing water temperature and disrupting sediment transport, but they do not typically improve water quality.

Spilling refers to the controlled release of water from a hydropower dam when the reservoir is full or when there is excess water that cannot be used for electricity generation.

While hydropower can have positive social impacts such as improved access to electricity and job creation, it is not typically associated with increased tourism.

The high construction costs of hydropower projects can increase the financial risk for investors and developers, making it more difficult to secure financing for these projects.

Increasing dam height is not a mitigation measure for the environmental impacts of hydropower, but rather a way to increase the capacity of a hydropower plant.

Hydroelectricity refers to the process of converting the kinetic energy of flowing water into electrical energy using hydropower turbines.

While hydropower can have positive economic benefits such as job creation and increased tax revenue, it is not typically associated with enhanced tourism.

The displacement of local communities due to hydropower projects can lead to the loss of livelihoods, as people may be forced to abandon their traditional occupations and sources of income.

Hydropower dams can have negative impacts on biodiversity, such as habitat fragmentation and disruption of fish migration, and are not typically associated with increased biodiversity.