They aren't. You are lapping up marketing drivel from big builders. Delivery of goods is the prime transportation issue in carbon footprint. Delivery of goods i

They aren't. You are lapping up marketing drivel from big builders. Delivery of goods is the prime transportation issue in carbon footprint. Delivery of goods is multiplied in high density areas. Multiple vacuum cleaners, one for each apartment, rather than 5 people sharing a house, they each live in separate one bedroom apartments with separate things. 5 times the deliveries, 5 times the manufacturing, 5 times the pollution, not just carbon.