Fig. 1. Land-use category conversion in China from 1990 to 2010 (unit: 10⁶ ha).

The letters A to F represent the land-use categories remaining in farmland, forestland, grassland, water, built-up land, and other land from 1990 to 2010, respectively; and the letter G represents land converted into a different land-use type. The numbers 1 to 6 in each bar chart represent the net area change in farmland, forestland, grassland, water, built-up land, and other land, respectively.