This visualization maps changes in forest coverage from 2000 to 2010 across countries, with a dropdown menu to adjust the tree-coverage threshold (e.g., 30%) that defines what counts as forest. The map uses a red-yellow-green color scale to indicate the percentage change in forested area, tinting each country accordingly. Built with D3.js, it fetches topojson country outlines via `d3.geoPath` and a natural Earth projection, while parsing CSV data for the coverage deltas. The menu uses D3’s data join to update the threshold and redraw the map.