Atlantic Trivia: Opera and the Atmosphere Geoengineering research has long explored the potential of a specific element, naturally released by volcanoes, to reflect solar radiation back into space. The atomic symbol for this element is S. This trivia question is part of a series from The Atlantic, with information on how to find past questions and subscribe to their daily newsletter.

• Geoengineering research has focused on an element that reflects sunlight.
• This element is naturally released into the atmosphere by volcanoes.
• The atomic symbol for this element is S.
• The question is part of Atlantic Trivia.
• Information is provided on accessing previous questions and subscribing to The Atlantic Daily.