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Determine the number of vertices and edges and find the in-degree and out-degree of each vertex for the given directed multigraph.
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Answer:
Early 1900s tried to build a canal along the Niagra River, but never got finished, so empty canals just sat there lined with cement 1940s: bought to hold chemical waste because was already lined with cement 1960s: became a place for people to move to and the town grew because became a nice place to live The chemical company didn’t want to sell the area because filled with chemical waste, but was forced to sell Contract 1970s: a lot of impermeable sediments were removed with construction of basements and in this time, recharge was very high so water table rose Rising water table brought up chemical wastes with it People started noticing that health was decreasing Over 50% of infants were born with defects 1978: local homeowners learned that there was 21000 tons of chemical waste underground Children would get chemical burns just by falling and rolling around in grass, which demonstrates how much the chemical waste has risen Who’s responsible August 7, 1978: Jimmy Carter declared a federal state of emergency, ordering families to evacuate 9/11 and Hurricane Katrina were also federal states of emergency, so this was a huge deal, and it was just caused by groundwater 1980: “Superfund Act” allowed federal money to be used to help clean up the area Became the very first superfund site 1994: the legal cases were resolved; the chemical company was found responsible and had to pay millions of dollars Love Canal Aftermath: 2008: survey of 4 states found that 500,000 kids in schools were less than half a mile from waste dumps, including one on top of a PCB dump (can cause cancer)