There are a lot of countries around the world with minimal or no access to electricity and air conditioning is a luxury that they just cannot afford. Quite often these countries are the ones with the hottest temperatures and people struggle on a daily basis with stifling heat in their enclosed houses.
In Daulatdia Bangladesh, they have come up with a solution for the problem using old bottles quite often found littering the streets.So not only does it cool their enclosed huts by almost 10 degrees it also encourages people to pick up the bottles littering the streets.