A college student walks down New York City's Fifth Avenue at 8:00 AM. She is late for class so she catches the bus for the last 2 miles of her commute. Did she have a larger ecological footprint when she was walking or when she was on the bus?

Question

A. on the bus, because it is using energy to
move
B. on the bus, because the road took more
energy to build than the sidewalk
C. walking, because she is using energy that
must be replaced by eating foods that are not
locally grown
D. walking, because she is moving on a
sidewalk that took energy and raw materials
to build
E. More information is needed about, for
example, the number of people on the bus
and its fuel source, to accurately determine
her ecological footprint in both situations.

Answer 1

E