Took the train to Amsterdam the other day, on the way there is an apartment building where the shared hallways are on the train-tracks side of the building, it's floor to ceiling glass. Some sections of it had cardboard or even aluminium foil to try and keep the sun / heat out, that one looked like a greenhouse.
Likewise, I work for an energy company, in summer the aging AC (which they keep low because an energy company's policy and marketing is actually the opposite of what they provide) cannot keep up because there's nothing keeping the sunlight out but flimsy shades on the inside.