began to replace humans, animals, and even the waterwheel as the source of power in factories
A. Steam
B. Solar
C. Electricity
D. Gasoline

How many citizens of mexico does it take to equal the ecological footprint of the average citizen of the united states? it takes nearly three mexican citizens to equal the ecological footprint of the average u.s. citizen. it takes about 12 mexican citizens to equal the ecological footprint of the average u.s. citizen. it takes just over eight mexican citizens to equal the ecological footprint of the average u.s. citizen. two citizens of mexico equal the ecological footprint of one average citizen of the united states. they are essentially equal?

Which german count invented the zeppelin

What did the japanese regard as the main purpose of the attack