Humanity has 'broken the water cycle,' UN chief warns

The future of humanity's "lifeblood"—water—is under threat worldwide, the UN secretary-general warned Wednesday at the opening of the global body's first major meeting on water resources in nearly half a century.

This new sensor can detect mercury ions with just a tap

Although many measures are in place to prevent contamination, pollutants such as mercury and lead can still end up in the environment. Sensing them often requires complicated processes, but what if you could detect them with ...

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