Zinzi and Agnoli [62] estimated that green roofs save 10%e14% of the electrical energy consumed in cooling residential buildings. By considering the price of electricity as $0.1/kWh [33], this analysis considers that green roofs can reduce urban temperature, represented as a benefit, between $8.3E-3/m2 ($7.6E-4/ft2) and $1.2E-3/m2 ($1.6E-4/ft2).