Rooftop gardens also reduce the heat that concrete structures absorb throughout the day and then re-emit at night, keeping cities cooler overall. Research also shows that even relatively small rooftop gardens can reduce surrounding air temperatures by more than half a degree Fahrenheit. Tending Community HealthBeyond rooftop gardens’ environmental benefits, they can also provide food and income to the families who tend them. Schaduf, founded in 2011, establishes produce-bearing rooftop gardens for Egyptian and migrant families in informal neighborhoods. Many students, after learning about rooftop gardens in school, have convinced their parents to research them further.