<s class="aside-in"><em>mentioned in 5 topics, 1 evergreen</em></s> #### <s class="topic-title">[[greenhouse gases]]</s> > [!wikipedia] [greenhouse gases](https://en.wikipedia.org/wiki/Greenhouse%20gas) > > A greenhouse gas is a gas that absorbs and emits radiant [[energy]] within the thermal infrared range, causing the [[greenhouse effect]]. The primary greenhouse gases in [[Earth]]'s [[atmosphere]] are water vapor (H2O), carbon dioxide (CO2), methane (CH4), nitrous oxide (N2O), and ozone (O3). Without greenhouse gases, the average temperature of Earth's surface would be about −18 °C (0 °F), rather than the present average of 15 °C (59 °F). The atmospheres of Venus, Mars and Titan also contain greenhouse gases. > ##### ^dataviews > [!dataview]+ Related unlinked notes > > - [[Greenhouse gases absorb only specific wavelengths of energy]] > [!dataview]- Other unlinked mentions > > - [[clean electricity]] > - [[climate change]] > - [[fossil fuels]]