"Slavery had died out, replaced in the cities and factories by immigrant labor from ... Northern children were slightly more prone to attend school than Southern ...
Comparing and Contrasting the North and South. Directions - Copy ... Increase in factory work brought more people to live in the cities. • Cities were ... Small farmers had little or no education. ... 30,000 miles of track was laid by 1850. • Canals ...
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Rudder is a Chinese innovation permitted boats to move their sails and to cruise into the twist interestingly. The most punctual say of the ship rudder originates from a picture on a bit of stoneware which goes back to first century in China, amid the Han Dynasty. This originates before the presentation of the rudder in the Western world by around a thousand years.
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Water pollution is defined as the presence in groundwater of toxic chemicals and biological agents that exceed what is naturally found in the water and may pose a threat to human health and/or the environment.
Air Pollution is defined as the presence of substances in the atmosphere that have a harmful effect on human health as well as the health of other living organisms
