Changing a river into a lake is basically what a large dam does. one reason we do this to create reservoirs of fresh water. however, dams change the local ecosystem in a big way. what is one negative impact of building a dam? a) dams are needed to create hydroelectricity. b) dams can create smog that pollutes the lake. c) dams can reduce the intense heat of summer. d) sometimes people who lived along the banks of the river are displaced.

The body is protected against harmful flu viruses by

Which best compares habitat and niche? o niche is a place in which organisms live, and habitat is the way in which an organism fits into its habitat.o habitat is a place in which organisms live, and niche is the way in which an organism fits into its habitat.habitat is a group of organisms that live in an area, and niche is a specific species that lives in that areao niche is a group of organisms that live in an area, and habitat is a specific species that lives in that area.

Some mining processes involve removal of large areas of earths surface in the mined region this practice causes severe environmental damage by allowing which natural process to accelerate in the affected areas? a.precipitation b.erosion c.migration d.condensation