For Earth Day 2021, we explore the connections of Earth systems and NASA's ability to observe them in a changing world, highlighting the links between dust transport, vegetation, water quality, conservation and human health, the cryosphere, and disasters.<br /><br />Music: "Ellipsis" and "Terrafirma" by Ben Niblett and Jon Cotton [PRS] via Universal Production Music<br /><br />Video credit: NASA's Goddard Space Flight Center<br />Jefferson Beck (USRA): Lead Producer<br />Ellen T. Gray (ADNET): Writer<br />Sofie Bates (KBR): Writer<br />Roberto Molar Candanosa (KBR): Writer
