... used by planetary scientists to refer to water, methane, and ammonia which usually occur as solids in the outer solar system ... In astronomy it includes hydrogen, helium, water, ammonia, carbon dioxide and methane. white dwarf . ...
... Climate changes may also change the emission of methane from wet soil. ... It is found that the climate-methane cycle feedback, despite markedly amplifying the CH 4 build up in the atmosphere, change ...