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Himalayas

All-seeing eyes: The epic plan to track almost everything on Earth

30 October 2019

Firms are racing to create a real-time database of every object on Earth larger than a car. It would help investors and conservationists, but could it be abused?
Cyclist carrying Flow

A cheap pollution sensor will keep you off the dirtiest roads

26 September 2017

This wearable device reveals exposure to the three worst pollutants, linking it with online maps to help you avoid poor air, a bit like a Fitbit for pollution

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