Which planet's poisonous atmosphere is attributed to the "runaway greenhouse effect"?

Player #25874027, Can never refer this as man made since it is supposed to be on Venus. And ,as for me , I will continue to drive what I want and eat a burger once in awhile.

Player #25874027, Can they even hear us??

I told them Venusians they needed to stop driving petrol cars and change to a Vegan diet!! Did they listen???