Claim: Venus is not hot because of a runaway greenhouse.

Relevance (1 = gold evidence, 0 = mined hard negative): 1
Passage: He also perceived global warming as a growing, man-made danger and likened it to the natural development of Venus into a hot, life-hostile planet through a kind of runaway greenhouse effect.

Relevance (1 = gold evidence, 0 = mined hard negative): 1
Passage: The planet Venus experienced runaway greenhouse effect, resulting in an atmosphere which is 96% carbon dioxide, with surface atmospheric pressure roughly the same as found 900 m (3,000 ft) underwater on Earth.

Relevance (1 = gold evidence, 0 = mined hard negative): 1
Passage: It may have had water oceans in the past, but these would have vaporized as the temperature rose due to a runaway greenhouse effect.

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: A runaway greenhouse effect involving carbon dioxide and water vapor has long ago been hypothesized to have occurred on Venus, this idea is still largely accepted[citation needed].

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: Studies have suggested that billions of years ago, Venus's atmosphere was much more like the one surrounding Earth, and that there may have been substantial quantities of liquid water on the surface, but after a period of 600 million to several billion years, a runaway greenhouse effect was caused by the evaporation of that original water, which generated a critical level of greenhouse gases in its atmosphere.

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: In the extreme, the planet Venus is thought to have experienced a very large increase in greenhouse effect over its lifetime, so much so that its poles have warmed sufficiently to render its surface temperature effectively isothermal (no difference between poles and equator).

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: More recent studies have suggested that several billion years ago, Venus's atmosphere was much more like Earth's than it is now and that there were probably substantial quantities of liquid water on the surface, but a runaway greenhouse effect was caused by the evaporation of that original water, which generated a critical level of greenhouse gases in its atmosphere.

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: Venus is by far the hottest planet in the Solar System, with a mean surface temperature of 735 K (462 °C; 863 °F), even though Mercury is closer to the Sun.

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: Venus receives about twice the sunlight that Earth does, which is thought to have contributed to its runaway greenhouse effect.

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: This makes Venus's surface hotter than Mercury's, which has a minimum surface temperature of 53 K (−220 °C; −364 °F) and maximum surface temperature of 700 K (427 °C; 801 °F), even though Venus is nearly twice Mercury's distance from the Sun and thus receives only 25% of Mercury's solar irradiance.

Relevance (1 = gold evidence, 0 = mined hard negative): 0
Passage: Venus is the second planet from the sun.