Ventilation has always been an issue in underground mines.

True
False

How did geography impact the development of the early russia?

What was the significant advancement of the caravel? a. it could sail with the wind c. it could sail against the wind b. it could sail at night d. it was motorized

Select the correct answer. what are concurrent powers? a. powers granted solely to state governments b. powers granted to the national government c. powers transferred between government leaders d.powers shared between national and state governments