How the runaway greenhouse gas effect can destroy a planet's habitability — including Earth's 

 Scientists watched as a simulated planet was driven from a habitable Earth-like heaven to an inhospitable Venus-like hell as the result of a runaway greenhouse effect, delivering a stark climate message. 

https://cdn.mos.cms.futurecdn.net/YH5bSkfTrM3MuFPHgtJZ3V.jpg

https://www.space.com/planets-earth-venus-greenhouse-gases-climate-change