It is often difficult to grasp. This is why when you look at an empty piece of land, it can sometimes be difficult to visualize actually fitting a building on it. And why when you look at an empty room, it's common to think, "there's no way that furniture will fit in here." But in the end, it does fit.

It also tends to be relative. Here in North America, it is common to argue over things like parking space dimensions and drive aisle widths. We'll say things like, "well, people like their big cars." But then you travel to Europe and you find streets like this:

And this:

The first is only marginally bigger than the width of a parking space in Toronto (2.6 meters). And the latter is only marginally bigger than the width of a typical two-way drive aisle (6 meters). So are these too small? Well, it depends on your perspective.

If your basis of measurement is the size of cars, then these streets will seem too small. Cars also keep getting bigger, so you have this inflation factor to deal with. But if your basis of measurement is something else, such as walkability, then maybe they're just right.

Ordinarily, solar panels make the most sense on the roof of a building. This is often where you can harvest the most solar energy. But sometimes it can make sense to install them vertically, like in the case of the above building in Scuol, Switzerland. I am by no means an expert on solar, but I am told that this can make sense in snowy climates (where rooftop panels are likely to get covered) and in northern locations where the lower angle of the sun means a vertical position actually catches the sun more effectively (especially during the winter months). It could also be the case that you just don't have any available roof space. Either way, you have to look at and model out the entire year when it comes to solar.

We are staying in our 6th hotel of this trip right now. And only 50% of these hotels have had air conditioning. This had led to a few restless sleeps where it was simply too hot. In one of our hotels, we had to ask them to bring a fan up to our room. But hey, this is Europe. I'm sure everyone thought we were spoiled North Americans. Interestingly enough, not having AC forces you to be more aware of the environment around you. Very quickly you learn that if you don't shut the blinds or shutters when the afternoon sun is shining in, you are going to end up with a room that is too hot to sleep in. I try to be mindful of this back home in Toronto, where we do have AC, but there really isn't the same imperative to both design and then operate around climate and local conditions. Active mechanical systems do much of this for us.