Warm cardigan day

Today is warm cardigan day.
People are supposed to dress warmer so the heating can be set lower, which is more environmentally friendly and costs less.

Especially schools and governmental buildings are often too warm inside.

Our school used to be one of them.
But since the renovation it's far too cold in school.
So we're already wearing warmer clothes.

I think the heating can be down in shops. Especially those shops were they have a kind of high temperature wall.
It feels terrible to walk through that wall. And I don't think it is of a lot of use.

What do you think?