significant concentrations of sulfur dioxide in a planet's atmosphere can suggest that the planet is likely uninhabitable, allowing researchers to eliminate it from further consideration.

The G.G. Allen Steam Plant features a large scrubber to reduce sulfur dioxide emissions from the plant. These are common in developed countries to reduce pollution. Credit: Murr Rhame, CC-BY-SA-3. ...

WASHINGTON— Three public health and conservation groups sued the Environmental Protection Agency today for failing to ensure that parts of Maryland and Michigan have effective plans for cleaning up ...