I was walking in Glasgow, everything felt grey, bland and depressive.

At some point I realized they have zero trees in the streets. Also means no bird sounds in the background, no green leaves adding some colors to the concrete, no blossoming in the spring.

Being in a city where every street is filled with trees I realized how big of an impact it is.

It is however not "easy", the old big trees you want, destroy your streets, branches fall in storms, sometimes even whole trees fall over.