Square metre

A floor 4 metres square contains four squared square metres.

There's not nearly enough mortar for thirty-two square metres of wall.

As towns continue to grow, replanting vegetation has become a form of urban utopia and green roofs are spreading fast. Last year 1m square metres of plant-covered roofing was built in France, as much as in the US, and 10 times more than in Germany, the pioneer in this field.