(par 5.1.3 ) Industrial Revolution (wikipedia)
http://en.wikipedia.org/wiki/Industrial_Revolution From Wikipedia, the free encyclopedia Iron and Coal, 1855–60, by William Bell Scott illustrates the central place of coal and iron working in the industrial revolution and the heavy engineering projects they made possible. The Industrial Revolution was the transition to new manufacturing processes in the period from about 1760 to sometime between 1820 and 1840. This transition […]
(par 5.1.2) Industrial farm model is damaging environment
http://www.greenbaypressgazette.com/story/opinion/2014/09/03/industrial-farm-model-damaging-environment/15039641/ Lee Luft 5:09 p.m. CDT September 3, 2014 File(Photo: Alyssa Bloechl/Kewaunee County Star-News ) Thank you for your Aug. 25 front-page article by Kate Golden, “In karst area, even good farming may pollute groundwater.” As the article states, the shallow soils and karst (cracked) bedrock common in Northeastern Wisconsin provides little filtration for the animal […]
(par 5.1.2) Salinization
http://people.oregonstate.edu/~muirp/saliniz.htm Salinization refers to a build up of salts in soil, eventually to toxic levels for plants. (3,000 – 6,000 ppm salt results in trouble for most cultivated plants.) Salt in soils decreases the osmotic potential of the soil so that plants can’t take up water from it. When soils are salty, the soil has […]