Meanings of least sustainable in English

One of the least sustainable forms of development is unplanned sprawl across counties Wicklow, Kildare and Meath.

So here's my list of the solutions for reducing fossil fuel consumption, ranked from most to least sustainable.

It's a lot better than doing nothing. Plight of Phoenix: how long can the world's ' least sustainable' city survive?

In July it may announce moves to curb the least sustainable -possibly by raising an EU-widesustainability benchmark.

The Commission will now consider four options, ranging from simply monitoring the situation to introducing new sustainability requirements or penalties for the least sustainable biofuels.