elevation noun [C/U]. âº âheight above the âsurface of the âearth, or an âarea that is âhigher than the âsurrounding âland: [C] At âhigher elevations, the âair is âcolder. (Definition of elevation from the Cambridge Academic Content Dictionary Â© Cambridge University Press).
A dissolved gas is, simply enough, gas that has been dissolved into another material. This creates a solution, a mixture, where the gas is the solute, the minor component, and the other material, generally a liquid, is the solvent, the main component.
Greenhouse gases are gases in the Earthâs atmosphere that can absorb and emit radiation. This particular process is the main cause of the greenhouse effect that is currently a threat to our planet. Main greenhouse gases are composed of water vapor, methane, carbon dioxide, nitrous oxide and Ozone.