People build a dam to create a reservoir that supplies water a nearby city needs. describe two ways this action will likely affect the water cycle in the local environment.

A dam can impact the water cycle by preventing the natural flow of water which disrupts the natural flooding process that occurs downstream which provides nutrients to the surrounding area. Also the water cycle is disrupted in regards to fish and the flow of species downstream because the dam impedes the flow of these species in their natural habitat. 

If you will look at the sun through magnifying glass then the glass will defocus your eyes and so damage will be reduced.

Largely uneconomic because they provide little profit or food surplusi think so