Inspired by the Depression-era Farm Security Administration photography project, its photographers shot everything from small Midwestern towns, barrios in the Southwest and coal-mining communities in Appalachia to African-Americans in Chicago, urban renewal in Kansas City and migrant farm workers in Colorado.

FORBES: Valerie Harper, Dick Cavett To Be Interviewed This Week In Live Webcasts By National Archives

He said the main cause of decline in wild bees, such as mining and mason species, was loss of habitat due to a variety of reasons including urban development.

BBC: Oxford's The Kidneys Jubilee flower meadow for bees

However, both are now seriously threatened by deforestation and invasive practices, including intensive mining and logging, extensive livestock activity, water pollution, degradation of headwaters, unregulated processes of urban settlement, construction of roads, waterways and dams, drainage and diversion of rivers, burning of forests and illegal fishing and trade in wildlife.

UNESCO: Intangible Cultural Heritage