The building draws on the bumbung limas roof design, shading the walls and allowing natural ventilation.

CNN: SPECIAL REPORT CITIES

To keep his buildings cool, the architect uses greenery, natural ventilation and shaded pedestrian routes -- similar to traditional Chinese shophouses.

CNN: SPECIAL REPORT CITIES

Mr. Garrison, the architect, said each one features skylights and extensive natural ventilation, with solar panels on their roofs to generate power.

WSJ: Bathrooms' Long Trek to Replace Sandy-Wrecked Facilities

"Passive renewable energy" measures, such as using natural ventilation to cool a building and spacing windows to maximize the sun's light, are other ways to slash a building's electric bill.

FORBES: Magazine Article

The laundry list of green features of each Oil Silo Home is exhaustive: super-thick insulated wall panels, rainwater recycling systems, rooftop gardens, natural ventilation, EV charging stations, radiant floor heating, green walls, and the list goes on and on.

FORBES: Written by Matt Hickman

In his brilliant 1991 design for Frankfurt's Commerzbank, the tallest office building in Europe, he brought off the seemingly impossible feat of building a supertower that could use natural ventilation (as against fuel-gobbling air conditioning) during 60% of the year.

CNN: ASIANOW - TIME Asia

"The premises consists of cells without natural light and ventilation located in the basement and foundation and dug into the ground, " said Irina Petrova, assistant to the state attorney.

CNN: Russian authorities find sect members living underground

Converting bunkers poses challenges: Few windows mean little natural light, poor ventilation and dampness.

WSJ: New Lives for Nazi-Era Bunkers