"[t]he influence of  so-called greenhouse gases on near-surface temperature - is not yet  absolutely proven.
"[t]he influence of  so-called greenhouse gases on near-surface temperature - is not yet  absolutely proven.
greenhouse effect:76
the presence of n2, ch4, and h2 in the atmosphere contribute to a greenhouse effect, increasing the surface temperature by 21k over the expected temperature of the body with no atmosphere.