How can you build efficient Urban communities, homes, and businesses?

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Buildings, yards and sidewalks inside greenhouses.

Most energy is used to keep buildings warm in the winter. Solar panels are more costly and less effective than living iside a greenhouse. Additional benefits include providing the best environment for gardens, which produce oxygen & consume carbon-dioxide, and protection from polluted air, acid rain, hail and snow. It's important not to have roads, driveways or garages for cars within, because of their harmful emissions. For summer, thermometer-based automation on the roof-windows can have them open when it gets too warm inside, and a roll-out shade over the entire greenhouse can be put on top, for the hottest parts of the day. Compared to solar, this provides far more bang for the buck, with a wider range of benefits. Those windows bordering roads can be reinforced with I-beam frames.