Install car horns as a prepaid service, just like cellphones. By using the horn, spend the credits.
Too many people get wet because of unexpected storms. Public umbrellas would solve that problem.
Parkings around the downtown of Belo Horizonte with public bikes to access the busiest area of the city reducing the traffic jam.
50% dos ingressos para os jogos do Brasil em 2014 poderiam ser adquiridos e sorteados pelo governo brasileiro.
Oblige aviation companies to give compensation in Miles to its passengers with delayed flights. Maybe 1.000 miles per hour lost.
Design good experiences to the homeless changing the shelters. Create community shelters where the homeless people can exchange experiences.