Changing a river into a lake is basically what a large dam does. One reason we do this to create reservoirs of freshwater. 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 help reduce the intense heat of summer.
D) Sometimes people who lived along the banks of the river are displaced.

Transportation is the largest single source of air pollution in the united states. air pollution can harm the environment and human health. which technology could offer a solution to this problem? mufflers that reduce noise motors that run on electricity tires that improve gas mileage

Identify one disadvantage to each of the following models of electron configuration: -dot structures -arrow and line diagrams -written electron configurations type in your answer below. (answer) -dot structures do not show the distribution of electrons in orbitals and take up a lot of space. -arrow and line diagrams take up a lot of space and make it difficult to count electrons. -written configurations make it easy to lose count of electrons and do not show the distribution of electrons in orbitals.

Asample of tin (ii) chloride has a mass of 0.49 g. after heating, it has a mass of 0.41 g.  what is the percent by mass of water in the hydrate?   %