What was an effect of the duke coal ash spill?
a. the coal industry reduced the total amount of coal that could be mined.
b. duke energy went out of business due to millions of dollars in fines.
c. the dan river dam was built to provide an outlet for liquefied coal ash.
d. north carolina legislators changed coal ash storage requirements.

Marine exptoration of oil uses seismic waves to locate oil in the seabed. what is a negative impact from seismic waves on the aquatic ecosystem of the ocean? a. seismic waves kill microoganisms b. seismic waves disrupts the sand and causes seafloor erosion c. seismic waves have virtually no adverse affects on marine life d. seismic waves damage the sonar that dolphins and whales use to orient themselves underwater

Describe the relations between the united states and other countries under the articles of confederation. 3-4 sentences

Develop your own point of view on whether the us should have expanded its borders. use information from the lesson and the maps to explain your opinion. give at least two reasons for your point of view and answer the following in complete sentences.