How has the level of recycled materials changed since 1960?
A coordinate graph titled M S W Generation Rates, nineteen sixty to twenty twelve showing Total M S W generation and Per capita generation on horizontal axis, Total M S W generation in million tons on left vertical axis represented with triangle, and Per capita generation on right vertical axis represented with squares. Two increasing lines are formed on graphs, one with triangles and the other with squares.
gone down
stayed the same
plummeted
gone up
