Healthy Spaces

More than 95% of the world's population is breathing unsafe air

Mexico City's garden-lined highway is thriving, but not without criticism

Here's what happens when you hold back gas

Sunlight may help kill dust-based bacteria

It's easier to breathe in Beijing these days

12 ways to get clean air without chemicals

Cervical cancer has nearly been eliminated in Australia

What makes a city a good place to get old?

Just when you thought they couldn't re-invent the pillow, along comes NASA ...

These 10 cities are embracing 100% renewable energy

'Poop Patrol' to hit the streets of San Francisco

The issue for boomers won't be 'aging in place'

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