3. in what year was the federal water pollution control act established?\na. 1869\nb. 1935\nc. 1948\nd…

3. in what year was the federal water pollution control act established?\na. 1869\nb. 1935\nc. 1948\nd. 1978\n\n4. denitrification is an essential step in which of the following cycles?\na. carbon\nb. nitrogen\nc. phosphorus\nd. hydrogen

3. in what year was the federal water pollution control act established?\na. 1869\nb. 1935\nc. 1948\nd. 1978\n\n4. denitrification is an essential step in which of the following cycles?\na. carbon\nb. nitrogen\nc. phosphorus\nd. hydrogen

Answer

Answer:

  1. C. 1948
  2. B. Nitrogen

Brief Explanations:

  1. The Federal Water Pollution Control Act was established in 1948.
  2. Denitrification is a key part of the nitrogen - cycle, converting nitrates to nitrogen gas.