Possibly from allowing sunlight into the building which heats the interior. Air conditioning must work extra hard to overcome the heat.
But in the winter that takes the burden off the heating system, as long as they're using windows with decent insulation.
They're just giant greenhouses. When the AC goes out after 6pm the residual heat from the day makes it unbearable to stay in the office to work
Terrible in the summer. Mediocre in the winter. But pretty great in the fall and spring.
Passive solar heating is amazing for colder climates.
Yep, buildings are the most energy inefficient thing we have. Glass is problematic, but also fire regulations that prevent natural air circulation in builings and then require AC. (Air conditioning/active cooling)