Think outside the bubble, though.
There's unused land everywhere I look.
Why are we dissing zero-emission cars and self-production of home energy?
A single family homes and car mindset is the bubble, though.
The US and much of the developed world has a problem of over-consumption, and shuffling to more power, some green, does not solve it. We need green energy, but if we want to reduce emissions we need to cut usage as well.
The amount of energy needed to cart single occupancy cars, on hour long commutes through sprawling suburbs of energy guzzling single family homes is horribly inefficient, no matter how it's powered. Nearly a third of the energy consumed in the US goes to transportation.
It makes no sense for multi-ton hunks of steel, plastic and lithium using tens of kW in energy to transport a 150 lbs person to work.
Denser cities and towns organized around public transit, cycling, and walking knocks out a multitude of problems.
1. Reduced distances between home, work, and shopping and allow for healthier, emission-free walking and cycling
2. Increased density reduces per capita cost on infrastructure and services and makes fast, frequent transit a realistic alternative
3. Denser multifamily development offers efficiencies in shared heating and cooling systems, a major consumer of energy
4. Cutting back on sprawl reduces the amount of land developed and contaminated by development, and frequently preserves productive agricultural land from being permanently developed
These aren't radical ideas. We have models throughout the world of greener, denser and healthier cities, mostly built before the auto.