Why is Hong Kong's ecological footprint bigger than its land size?
a) Because Hong Kong is very efficient in the use of its land and resources.
b) Because Hong Kong is very inefficient in the use of its land and resources.
c) Because Hong Kong residents consume so many resources, it imports many resources from other areas thus increasing its ecological footprint beyond its own boundaries.
d) Because Hong Kong is a port city, it consumes both land and ocean resources thus increasing its ecological footprint.