article_snippet: This map shows the grasslands of America.
article_snippet: Much of these prairielands have been converted into some of the richest agricultural regions on Earth .
article_snippet: Cornfields take up 91 million acres of the American landscape or around 4.83 per cent of the continuous US.
article_snippet: All the maps for this project were created using data from the US Department of Agriculture. 
article_snippet: London-based designer Mr Pecirno used freely-available data from from the US Department of Agriculture.
article_snippet: This program, known as CropScape, documents a large majority of the American landscape over numerous years. '
article_snippet: All the maps for this project were created using data from the US Department of Agriculture.