Examples of command economy

Blank is a naturally occurring gas that's found in most soils and rocks and can cause lung cancer

Jennifer is visiting her grandmother, who lives in the northeast corner of oklahoma. the region is home to many lakes, and jennifer enjoys canoeing on the illinois and grand rivers. to which region of oklahoma is she traveling? the prairie plains, the ozark plateau, the red river plains, the red beds plains

How do oceanographers measure the salinity of ocean water?