What makes potatoes more productive than other plant foods

Which british general is in charge of the war effort in the south

How did the new working class of the industrial revolution differ from the working classes of the earlier, farm based economy?

Which answer best describes an advantage of shipping goods by canal? a) most towns would rather have canals then noisy railroads b) goods could travel very fast downstream in the canal system c) traveling by boat is a much more relaxing way to transport goods. d) heavy loads of goods could travel by boat more easily then if pulled by horses.