What are two historical examples of how different civilizations used wind energy

Explanation:

Holland is probably the most famous example. The Dutch have always had wind mills to grind grain and pump water.

They certainly were not the first people to do this. The Persians did much the same thing from 500 to 900 BC.

Then there is the whole history of Navel vessels. People went up and down the Nile and across the Mediterranean using winds to fill sails so that ships could could move. The Spanish and English had whole fleets of wind powered ships used primarily as men of war.

this null effect is caused by a weak manipulation and ineffective internal validity. in a scientific study, as the one dr. morimoto is trying to perfom, internal validity refers to the confidence placed in the cause-effect relationship and to how well an experiment is done and able to eliminate confounding variables.        

no questions on whether they are allowed that right