Worldshaping

Worldshaping, also terraforming, is the shaping or modification of a planets surface and atmosphere, i.e. climate, topography, temperature, composition, ecology, etc., often to suit the needs of the people or mages employing such magic. Worldshaping is a cross-disciplinary approach, utilizing a host of methods that call upon mages from several fields, many of which are elemental. 
Magic users skilled in worldshaping are known as worldshapers or terramages.
Also: World Shaping