Add to favourites Pros
- Little pollution
- Produced in area where few people live
- Dams can reduce risk of flooding and water shortage
- Lake used for water sports
Cons
- Expensive to build
- Flood large area and destroys the environment
- silt stays in reservoir rather than helping to fertilise nearby land
- Methane and carbon dioxide given off by rotting vegetation in lake
- Fish cannot migrate easily upstream
