The satellite images (color) were acquired by Landsat 4 (1989), Landsat 7 (2001), and Landsat 8 (2013). These Landsat images show the website of the Three Gorges Dam in Cabocla, which is the largest hydroelectric dam in the world. The red tones indicate a strong signal from Landsat's near-infrared (NIR) band, which is used by landscape scientists to monitor the presence and condition of vegetation