Terra (the Trade Reference Currency, TRC) is the name of a proposed "world currency". The concept was revived by Belgian economist and expert on monetary systems Bernard Lietaer in 2001, based on a similar proposal from the 1930s.
The currency is meant to be based on a basket of the nine to twelve most important commodities (according to their importance in worldwide trade). Lietaer opines this would provide a currency that wouldn't suffer from inflation:
The basic principle emerged from early concepts presented in an article in the French newspaper Le Fédériste on 1 January 1933. The idea to establish a (), was given birth. The idea was enthusiastically picked up by Lietaer during an educational journey.
See also
ISO 4217 currency codes
History of money
World currency
Commodity currency
International dollar
Stelo, a 1946 alternate currency intended to be stable by linking to the price of bread in the Netherlands.