Why Does the Per-Capita Generation Curve Level Off Between 1990

Multiple Choice

Why does the per-capita generation curve level off between 1990 and 2010?

A) The overall number of households that produce garbage has decreased.
B) The upstream waste generated before the products reach consumers has decreased
C) The participation in household recycling and composting efforts has expanded.
D) The quantity and capacity of sanitary landfills has steadily increased.