Which factors have reduced air pollution in Western Europe? Select all that apply.

A Catalytic Converters

B Agricultural Intensification

C Burning Cleaner Fuels

D Metering Water Use

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

Which of the following best describes the aztecsa) skilled engineersb) peaceful farmers c) skilled writers d) mountain dwellers

The expansion of the railroad networks led to