Source: USGS Landsat Mission
In a recent International Journal of Health Geographics article, Susan Maxwell and colleagues have used Landsat data to assess pesticide exposure in California. Looking at time-series imagery of agricultural areas in the Fresno vicinity, the researchers found that the use of Landsat data can improve pesticide exposure assessments by identifying crop conditions when pesticides were applied. The free Landsat archive makes such data-intensive time-series studies possible.
+ “Using Landsat satellite data to support pesticide exposure assessment in California,” a preliminary PDF of the journal article [external link]
The world has lost 561 square miles (1,453 square kilometers) of salt marshes over the past 20 years.