Facts for Prelims (FFP)
Source: TH
Context: New research suggests that lower levels of carbon dioxide (CO2) in a planet’s atmosphere compared to its neighbours could indicate the presence of liquid water on that planet.
- The drop in CO2 levels relative to neighbouring planets may suggest the absorption of the gas by an ocean or isolation by biomass on a planetary scale.
- The study, introduces a new “habitability signature,” offering a practical method for detecting habitability in planets.
Significance:
- The researchers propose that examining CO2 levels and habitability could provide insights into Earth’s environmental tipping points and carbon levels that could render a planet uninhabitable.
- The habitability signature may also serve as a biosignature, as living organisms capture CO2, with the emission of oxygen as a tell-tale sign.
