Which organization announced World Bamboo Day?

World Bamboo Day is celebrated annually on September 18; the World Bamboo Organization (WBO) announced it on September 18, 2009, at the 8th World Bamboo Congress held in Bangkok. Bamboo is a fast-growing perennial grass that plays a crucial role in soil conservation, land restoration, and carbon sequestration; in India, its cultivation and processing are being promoted through the National Bamboo Mission.