What is a common environmental cost of building dams?

• A. Displaced people
• B. Creates jobs
• C. Freshwater supply
• D. Hydroelectricity

Answer: (A)

Displacing people is a common environmental cost of building dams. When a dam creates a large reservoir, valleys and floodplains are flooded, forcing communities to relocate. This uproots homes, farmland, and livelihoods, and often disrupts cultural sites and social networks. The social disruption can be long-lasting and costly for those moving, even if some compensation is offered.

Dams do bring benefits like a more reliable freshwater supply, hydroelectric power, and potential job opportunities, but these are benefits rather than costs. The environmentally visible impact highlighted here is the displacement of people, which reflects how large-scale infrastructure can transform both ecosystems and human communities.