In the future, neighborhoods could be recycling their own water, just like they recycle newspapers, bottles and cans.
Scientists, engineers and planners are figuring out new ways of speeding up supply chains, delivery and getting rid of waste.
Concepts from yesteryear about far-out technology prove how elusive the future can be.
As solar power gets more affordable, we're finding it all the right places.
Technology has no boundary. This week, we look at tech for pets, balls that teach kids about computer programming and robots inspired by salamanders.
Vertical farms increase production of food, reduce waste and naturally scrub the air of smog. What's not to love?
An urban plan for Paris could reduce the city's greenhouse gas emissions by up to 75 percent in 2050.
An underwater eco-city is designed for deep-sea living.
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