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Issues 18 28 Math Solutions - Question 18-5 What was the...

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Unformatted text preview: Question 18-5: What was the percentage increase in grainland area Harvested from 1950 to 2002'? “647 x 10") —{537 x 10.6)]; {587 x 10") = 0.102 = 10.2 ”/0 Question 18-6: Using the formula r = (lftfinf WIND) (see L’sing dwarf: in Environmental Issues. pages .. —- for an example of' how to use this formula}, calculate the annual percentage increase in grainland area harvested from 1950 to 2002- r = {1 it)ln(NiNo) = (nsznnu647 x 10"!537 x 106)] = 0.0019 = 0-19 “/0 Eer vear Question 1 8—8: The world's population in 1950 was approximately 2.55 billion. In 2002 it was 6.19 billion- Calculate the per capita area of grainlancl harvested for 1950 and 2002. 1950: 537 x ] 0‘3x2-ss x 10’ = 0.23 haicaEita 2002: 647 3: 10616.16 1’ 10’ = 0.10 halca ita __._____L Question 18-10: What was the percapita grain production in l 950‘? In 2006'? Characterize the change in percapita grain production from 1950 to 2006. ' Production was about 600 million tons in 1950, and was about 2,000 million tons in 2006- Populations were: 1950, 2,550 million; 2006, 6.53 billion. Thus met-capital production: 0.23 tonsilIr cagita 2006 percapita production: 0.30 tonslcaeita Question 18-12: Calculate the percapita meat production for 1950 and for 2003, then characterize the change in global percapita meat production beIWeen 1950 and 2003- Population in 2003 approx. 6.25 billion. 1950: meat 45 mnmmion. I‘M-teat pereapita = 0.01? tons- 2003 meat 254 I11 ' E’ 6.25 billion- Nieat percapita =fl.flfl.fl_tn.ns__ Question 18-15: What percent of the global grain harvest was fed to animals in 2006'? .W(714 mt fed to animals out of 1984 Int}. Issue 28 A SUSTAINABLE DIET Question 28-6: On average, hogs produce 6.4 pounds of waste per day each, while humans produce 2.3 pounds. Contrast the total waste produced by North Carolina’s human and hog populations per day for 1999. Hogs: (10 x106 hogs) x 6.4 pounds of wastefheg = 64 x 10" pounds of hog waste per day ——"————————.—-—_. Peeple: (8 x 106 people) it 2.3 pounds of wastefperson : 18.4 x 10"] pounds of human waste per m .423... If you interpret the question as asking for the entire year, then multiply each answer by 365. ~—lI——-III-——u- — Thus: 2.344 x 10'0 pounds of hog waste for [999; 6.72 x 109 pounds of human waste for 1999 —-—-———_.._....__________ Question 28-15! In 2001, U.S. per capita carbonated soft drink consumption was 49 gallons'é. A. How much is that per day per capita 49 gall365 days = 0.13 gal B. There are about 110—150 calories in a 12~ounce soda. How many calories does the average American consume in one day from sodas? Assume average calories = 130. Thus: 0.13 gel 3: 128 ouigal x 130 ea-L’lZeu 1* 180 cal C. On average, gaining one pound requires 3500 calories more than are used for metabolism. How many pounds would an average American gain in 5 years from sodas (assuming that these calories are not “burned” in metabolism)? 180 solid x 365 dig it 5 if X 1 lbz’3500eal = 93.8 .. can About 94 pounds ...
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