Gill Seyfang wrote:
One type of grassroots innovation is complementary
> currencies. Complementary currencies (CCs) such as LETS and Time Banks are
> cashless trading systems, which aim to deliver social, economic and
> environmental benefits, through building social capital, strengthening local
> economies, and promoting import substitution.
LETS are not cashless trading systems.
LETS are community currencies that are sometimes described as complementary.