An expression like &quot;runaway greenhouse effect&quot; is normally only used to describe what happened on planets like Venus.  IIRC on Earth there is a consensus about something like that to have &quot;virtually no chance&quot; of being induced by anthropogenic activities.<p>The fact that you&#x27;re so quick in using that expression suggests to me that you either don&#x27;t know what you&#x27;re talking about, or you just enjoy scaring people.