This is an interesting Ad campaign for the Salvation Army in Brazil; its main goal, to raise awareness, donations of clothes and money. Using real cardboard, plastic trash bags and other junk found in the streets, a sign is made up and posted outdoors. And on that sign is a picture referencing back to the living conditions of the people they help. Cheap and very effective.
Implications - By using found trash as an advertising medium, the Salvation Army created a hard-hitting ambient campaign without wasting money on billboards, posters or other resources. This emphasis on frugality and a care of one's community runs true to what the Salvation Army is all about.