The greenhouse effect is the process, or mechanism, by which greenhouse gases interfere with the direct radiation of heat energy leaving the surface of the planet. (ossfoundation.us)
Some, such as bacteria on leaf surfaces, do appear to be ubiquitous, but many others are not. (newscientist.com)
The low gravity of the planet meant that the player would regularly leave the surface for several seconds even when travelling at very low speeds. (vrfocus.com)