Bangladesh, officially the People's Republic of Bangladesh, is the world's eighth most populous country. Most of Bangladesh is covered by the Bengal delta, the largest delta on Earth. 17% of the country is covered by forests and 12% is covered by hill systems. The country's biodiversity includes a vast array of plant and wildlife, including critically endangered Bengal tigers, the national animal. In southeastern Bangladesh, experiments have been done since the 1960s to 'build with nature'. Construction of cross dams has induced a natural accretion of silt, creating new land. With Dutch funding, the Bangladeshi government began promoting the development of this new land in the late 1970s. The effort has become a multi-agency endeavor, building roads, culverts, embankments, cyclone shelters, toilets and ponds, as well as distributing land to settlers (Wikipedia).