The energy crisis currently engulfing Europe has bought into sharp focus that energy is not only an environmental issue, but also a national security issue.
This is almost certainly making other nations take a careful look at their own situation. Who are they reliant on for their energy needs? This article published in Europe energypost last week draws attention to the heat energy wastage in European cities (as it is in cities all over the world) through wastewater networks and how easily and quickly this situation can be improved to make cities more energy efficient.
Is this also relevant to US cities?