Mine are:
1. Dark roofs in the south
2. Lack of solar hot water heaters (especially in the south)
3. No grey water systems - seriously, people are softening, then filtering their water, then crapping in it.
4. Pretty much everything in suburbia.
BTW, I had a brilliant idea for how to get rid of Hummers (I thought of this before gas prices got high):
Congress should pass the "Hummer Requisition Act":
Citizens are allowed to buy Hummers, but must register themselves as the driver of the Hummer when they do so. If the military decides that the Hummer is needed for military action overseas, they can seize it by eminent domain, and the driver will be deployed along with his vehicle to the theatre of operations. Driver will be compensated for the value of the Hummer, and will given an enlistment, and paid as a PFC, with promotion possible to SPEC with good performance in combat.
Hummer sales would slow appreciably.
