Coal has no advantage over other energy sources except that it is very cheap.
a. true
b. false

Motivation cannot be developed with practice; a person either possesses it or they do not.

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

What happens when the temperature of a solution increases?