The phrase "lifeless planet" refers to a planet that does not support any form of living organisms, such as plants, animals, or humans. Full definition
Alarmist believe CO2 is the «control knob» of climate change and Dr. James Hansen, who studied climate on lifeless planets devoid of oceans, proselytizes that belief. (landscapesandcycles.net)
It might even seed the atmosphere of distant, lifeless planets with trace amounts of oxygen. (sciencenewsforstudents.org)
The same process also may have produced oxygen on Venus and other lifeless planets rich in carbon dioxide, the researchers say. (sciencenewsforstudents.org)