Clean air and water, a diversity of animal and plant species, soil and mineral resources, and predictable weather are annuities that will pay dividends for as long as the human race survives – and may even extend our stay on Earth. Alex Steffen More Quotes by Alex Steffen More Quotes From Alex Steffen If we're talking about transportation, the best thing a city can do is densify as quickly as it can. That needs to be said every time this issue comes up, because it's the only universal strategy that works. Alex Steffen city best time talking