How do deniers explain the surface temperature on Venus?
It’s also important to note that Venus is significantly hotter than Mercury despite being significantly further from the Sun (off the top of my head it’s about twice as hot and twice as far, but I could be wrong about that). The explanation of course being the runaway greenhouse effect on Venus. Deniers don’t have much to say about this except that the atmospheric concentration of CO2 on Earth is much less than on Venus. Nevertheless, it’s a perfect example of a runaway greenhouse effect in action. *edit* hah sorry, but you don’t actually expect deniers to click a link to a scientific website do you? That’s propaganda! I love how Jim completely fails to answer the question and also compares atmospheric concentration of CO2 instead of total amount of CO2, since Venus’ atmosphere is far more dense than Mars’.