Which of the following are classified as heavy metals?
A) carbon, hydrogen, oxygen
B) aluminum, iron, silicon
C) nitrogen, phosphorus, potassium
D) lead, mercury, cadmium
E) any nonbiodegradable materials
D
You might also like to view...
Compare the environmental effects of coal and uranium as power sources
What will be an ideal response?
Which of the following is a middle-level cloud type?
A) cirrostratus B) stratocumulus C) cumulonimbus D) altostratus
Which district in the North American Manufacturing Belt has a number of its cities located along the Erie Canal?
A) the central New York and Mohawk River valley B) Western Great Lakes, running from Detroit to Chicago C) Pittsburgh-Cleveland-Erie D) Middle Atlantic, including metropolitan New York E) southern New England, especially Boston
developed the theory of biological evolution
What will be an ideal response?