Late last year, I asked whether air purifiers were bunko or boffo. Today’s Wall Street Journal clears the air. Robert Davis’ verdict? Look for AHAM certification, test the noise level, know how often filters need to be replaced, and whether a portable filter reduces the pollutants that concern you.
World Changing Ideas
New workplaces, new food sources, new medicine--even an entirely new economic system.
The major tech ecosystems that battle for our attention and dollars.
What’s next for hardware, software, and services.
The brave new world of automation, from AI to drones.
How our urban centers are building toward the future.
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