4.The U.S. Municipal Solid Wastes data below show the generation of
waste in pounds per person per day and total waste generation in million
tons per year.
Year
1960
1970
1980
1990
2000
2002
2006
2007
2008
Daily Waste
Total Waste
(pounds per person/day) (millions of tons pear year)
2.7
88.1
3.3
3.7
4.5
4.6
4.6
4.6
4.6
4.5
121.1
151:1
205.2
238.3
239.4
251.3
254.6
249.6
Percentage
Recycled
6.4
6.6
9.6
16.2
24.5
29.5
32.3
33.1
33.2 According to the data in the graph, in which year did recycling have the greatest effect on total waste by percentage of waste recycled?