Why pre-historic mobility will never get old

The drawing was inspired when I was channel surfing and stopped at a history channel that showed reptilian animals crawling and then walking. 

For 5,000 years, we have been making cities that relied on human energy, animal power, and no mechanical mobility. These lessons are available to all of us.

As others have forewarned, we need to start the design process as if we have no fossil-fuel energy to use, so our starting point is a net zero. Once we have this sensibility, we can use energy-consuming equipment to supplement human comfort.

This is the only way forward to a sustainable future.