Spray-on technologies were developed specifically for large-scale applications on major earthworks projects where revegetation was a principal strategy for erosion control and time and cost was critical. Rather then using built structures, such as masonry walls, natural vegetation is used for a "green" anti-erosion surface stabiliser - the foliage protects the surface layer, and the root system binds the soil substructure. With the right choice of ingredients, excellent erosion control can be achieved in quite varied climates and local conditions. The technique is even more cost effective in areas difficult to access, having irregular terrains, or where conventional surface preparation is impractical (eg some mines and quarries, steep roadside batters, forests after bushfires etc.) Special slurries have been formulated (refer Enviroguard) to instantly stabilise and protect erosion susceptible surfaces whilst holding seeds close to the earth so they can germinate and facilitate growth of protective leaf and root structures.