The following layers can be turned on or off in SkyTruth Alerts:
- Tree Cover Loss (2001-2016)The Tree Cover Loss data layer is provided by Global Forest Watch. Tree cover loss is not only deforestation, but also includes fire and sustainable logging.
- EPA Facilities with Significant ViolationsThis layer shows facilities that have had significant violations with the EPA in the last quarter. The list is updated weekly. More information can be found at EPA ECHO.