Currently New Zealand, although for many years it was Australia, NZ's neighbor. This is mainly because the island nations are in the tropics.
This varies strongly, because ice cream is a popular dish. As of 2009, New Zealand consumes the most ice cream, however, Australia is in close second. This is because they are in the tropics.
The country that consumes the most energy to date is the United States of America the amount of aluminium they throw away in a year could replace the entire of its aircraft fleet 3 times over.
Spain
Canada
Guinea
massachusetts
USA USA
china
The Dominican Republic
France?
Turkey (you idiot)
UK