Mathematics and Society - OS X Lion Server

DID YOUKNON?Here is a sample page you can make up from newspaper, magazine or brochure clippings.1970What America is doing to reclaim energy and materials from municipal solid waste.Encouraging news in the war on wasteORIGIN; RESOU(~~~lrig~~7~'; DIVISiON. EPA To date, more than 50 U.S. communities are planning or actuallyoperating resource recovery facilities. These facilities are designedto recover some of the $2 billion worth of reusable materialsin the estimated 150 million tons of refuse Americans willdiscard this year alone. Significant trends are emerging. The chartat left is based on a recent study by the Environmentai ProtectionAgency. It plots the expected growth of municipai solid waste (topline) ... and the projected increase in resource recovery (shadedarea). It shows that in 1971, we recovered only 6% (eight milliontons) of our solid wastes. By 1990, we should be recovering 26%(58 million tons). And, as the chart also shows, net waste disposalcould level off by 1985 as the increase in recovery equals the\975 1990 increase in gross discards.225f-----+---+----+---::&J"',1-'''''---+---+----+-----11) Given a population of 210 million people--how much refuse on the average will eachAmerican throwaway this year? each day of this year?2) We will discard how much more in 1980 than we did in 1974? What is the percent ofincrease?3) What was the percent of recovery in 1975?Did you know that ...The "garbage" Americans throwaway each year contains: enoughferrous metal to build 4 million cars ... enough paper to printevery major newspaper in the country for a year ... enough combustiblematerial to generate the energy of over 200 million barrelsof oil. 0 A recent study forecasts that 10% of America'sgarbage will be used for energy by 1980. Projections from anothsrstudy indicate that more than 300 communilies with populationsover 10,000 will launch major resource recovery projects in thenext five years. 0 Connecticut plans a network of nine regionalresource recovery plants, Contracts have been signed for the firstplant; it will provide the electrical energy needs for approximately10% of the Bridgeport region's population.7) In 1976, what percent of waste will be reclaimed in Milwaukee?8) How many tons will be reclaimed?Resource recovery, big city style: Milwaukee, Wise. (pop. 717,099)The lights afMilwaukee's skyline: next year some of them will belit with electricity generated by burning the city's garbage. Milwaukeehas become the first city of its size in the U.S. wilh a longtermcontract for systematic solid waste recycling. In mid-1976,an $18 million facility designed, constructed, financed and operatedby American Can Company's Americology unit is scheduledto come on stream. When it does, about 20% of Milwaukee'sannual 270,000 tons of municipal waste will be reclaimed for itsusable steel, tin, aluminum, paper and glass. Another 60% will beconverted into combustible material with the annual energy equivalentof 75,000 tons of coal. Wisconsin Electric Power Companywill buy this fuel to help light the city's homes and offices.4) In 1980, how many tons of garbagewill be produced total that yearby each American if the estimatedpopulation will be 220 millionfor that year? for each day?5) Is it more or less than theaverage per day for 1975? By howmuch?6) In 1980 will you throwaway moreor less than this year?ADVERTISEMENT FROM: Saturday Review, July 12, 1975Permission to use granted by American Can Company~'American Can Company,a, American Lane~....... Greenwich, CT 06830 239