A study by UC Riverside highlights gases, such as fluorinated methane and sulfur hexafluoride, which could reveal terraformed planets altered for life. These gases, not found naturally, efficiently warm planets and may be used intentionally by civilizations to make harsh environments habitable, akin to proposals for Mars. While problematic on Earth due to environmental concerns, they could serve as “technosignatures” of advanced alien civilizations on distant planets. Detecting these gases using telescopes like the James Webb Space Telescope could provide clues about extraterrestrial technological interventions.
Identifying Artificial Greenhouse Gases on Terraformed Planets
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