Broadly speaking, the preferred approach to albedo modification seems to be sulphate aerosols in the higher atmosphere. A notable secondary approach is to modi

Broadly speaking, the preferred approach to albedo modification seems to be sulphate aerosols in the higher atmosphere. A notable secondary approach is to modify built-up areas like cities to be more reflective: mixing recycled glass into pavement, using light colored roofs, and other passive modifications. This has the special advantage of reducing the urban heat island effect, reducing emissions associated with cooling.