In the 1970s, the fourth king of Bhutan proposed an unusual method for measuring the countrys success. Unlike traditional measures, like the gross domestic product, the king suggested what he called gross national happiness. Gross national happiness means efforts in support of sustainable development, education and health, and valuing societal good over economic growth. The smoking of cigarettes is banned in the kingdom. In addition, Bhutan is the worlds only carbon-negative country. That means it produces less carbon than its forests and other plants take in. In 2016, the fifth and current king created the Laya Royal Highlander Festival, an event designed to bring tourists. The celebration takes place in October. It includes events like yak judging, wrestling competitions, pony races and native dancing.