Corona discharge Corona discharge A corona discharge is an electrical discharge brought on by the ionization of a fluid such as air surrounding a conductor that is electrically charged. Spontaneous corona discharges occur naturally in high-voltage systems unless care is taken to limit the electric field strength. A corona will occur when the strength of the electric field (potential gradient) around a conductor is high enough to form a conductive region, but not high enough to cause electrical breakdown or arcing to nearby objects. It is often seen as a bluish (or other color) glow in the air adjacent to pointed metal
Planetary health understanding and addressing the human health implications of accelerating change in the structure and function of Earth's natural systems." The Alliance's initiatives include the Rockefeller Foundation Planetary Health Fellowship, a planetary health course for Harvard undergraduates, and a Planetary Health Annual Meeting, which was first held in April 2017 in Boston, MA. The open-access journal "Lancet Planetary Health" published its inaugural issue in April 2017. Planetary health Planetary health refers to "the health of human civilization and the state of the natural systems on which it depends". In 2015, the Rockefeller Foundation and "The Lancet" launched the concept as the