Which of the following could be said about ecological footprints?
A. The average ecological footprints for various countries are nearly identical.
B. Ecological footprints can't be used to determine carrying capacity.
C. Ecological footprints don't take into account resources needed to absorb and manage wastes.
D. Exact ecological footprints are often difficult to calculate, but estimates can be useful in comparing populations.
Exact ecological footprints are often difficult to calculate, but estimates can be useful in comparing populations. - could be said about ecological footprints.
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