Source: Unleashing the Power of Earth Observations: Barbara Ryan at TEDxBarcelona, YouTube
Related Information:
+ The Group on Earth Observations Looks Toward a Second Decade of Data Sharing, Earthzine

Above the Earth, Below the Surface: Landsat’s Role in Monitoring Water Quality
Safeguarding freshwater resources is crucial, and while scientists use a variety of ground-based techniques to gauge water quality, the Landsat program has provided water quality data from orbit for decades.