Accessibility can easily look like an extra requirement when your own legs work. A ramp takes up space, a gentle route is longer, and resolving changes in level places constraints on design. It is easy to ask whether all of this is really necessary.

In Ukraine, the question looks different. War quickly makes visible what peaceful everyday life can easily hide: a person's functional ability is not permanent. A leg can be lost, vision can weaken, or balance can disappear. People still need to get home, to the shop, to work, to the bus stop and to the park.

An accessible entrance is no help if you cannot reach it. The street, yard and stop are part of the same route. A single step can break it.

A high kerb looks small when you can step over it. In front of a wheelchair, it is not small. A steep hill may be barely noticeable to a healthy person, but with a walker it can determine whether you get there. An accessible route that ends in a snowbank in winter is not an accessible route.

We do not need to go to war to understand this. People grow old. Legs get broken. Children are pushed in strollers. Illness and accidents change lives. Most of us will at some point need more from our surroundings than we do today.

That is why accessibility is not an add-on built for a special group. It is preparedness.

In a good situation, you may not notice it. In a bad situation, you notice immediately if it is missing.

Stormwater management can easily seem unnecessary when there is not too much water.

A depression takes space. A wetland takes space. Space should be left for green areas. The pipe might need to be built larger. It all costs money.

It is easy to ask whether all of this is really necessary.

Then comes a rainstorm the city was not designed for.

Water does not wait for the next budget cycle. It flows downhill. If no place has been made for it, it makes its own.

It may be a street.

A garage.

A basement.

A building entrance.

That is why stormwater management is not ultimately just about pipes. It is about where water is allowed to go when the pipes are no longer enough.

This is where landscape architecture comes in. Ground levels, vegetation, depressions, wetlands, parks and open flow routes can all be part of the system. The same place can be a lawn or park on an ordinary day and a temporary place for water during an extreme rainfall event.

Water does not recognize property boundaries either. A problem on one site can originate kilometres away in the upstream catchment.

That is why good stormwater design can look like empty space on an ordinary day.

During an extreme rainfall event, it looks very cheap.

The water has to fit somewhere anyway.

Good design decides the place before the water decides it for itself.

Biodiversity is sometimes discussed as if it were nature's own hobby.

It isn't.

Pollinators affect crop yields and crop quality. If pollinators decline, it is not only about whether there are fewer butterflies and bumblebees in summer.

It is about food.

And ultimately money.

If pollinators disappear, the bill arrives at the grocery store.

In the city, the same thing can be seen on a smaller scale.

A property boundary means nothing to a pollinator. It does not know where one housing company ends and another begins, or where city-owned land starts.

Two things matter to it.

Can it find food?

And is the next suitable place close enough?

A flowering yard can continue the chain to the neighbouring yard, street plantings and then a park.

That is why even a small yard can matter.

But nature-wise design does not mean giving up design.

Quite the opposite.

A yard should look good and work for people.

But if there is no room for any other life, something was left out of the design.

Good planning begins before the locations of buildings have been fixed.

If a site has a healthy large tree, the first question should not be where to plant a new one. First we should ask whether the old tree can be retained.

A new tree symbol takes seconds to draw on a plan. Growing a large tree takes decades.

A lot can happen in that time.

A large canopy provides shade, evaporates water and affects the local microclimate. But a tree needs space both above and below ground. In a dense city, that space will not appear later simply because a tree has been marked on the plan.

The benefits of trees are local too.

Finland has plenty of forest, but a tree growing a hundred kilometres away does not shade a hot street or an apartment courtyard. The value of an urban tree comes precisely from where it grows.

That is why trees should be brought into the process while there are still choices to make.

Not only at the end, when the buildings, streets and parking have already been decided and one question remains:

where can a tree still fit?