Today’s Solutions: December 19, 2025

Considering that more than 2 billion people worldwide lack access to safe drinking water, innovative solutions to the global water crisis are at an all-time premium. With that in mind, a team of researchers has recently developed a “green” material that uses sunlight to purify enough daily drinking water for four people in just one hour. The material releases electrons when exposed to light to create destructive oxygen-based chemicals that eliminate microbes. In tests, it killed nearly 100 percent of bacteria, including E. coli, in almost half the time it usually takes for similar technology to work. If scaled up, the novel material could potentially serve as a solution to produce water for underdeveloped and remote regions that lack a central supply of clean water.

Solutions News Source Print this article
More of Today's Solutions

New method uses sound waves to map soil health, stop famine, and restore farm...

BY THE OPTIMIST DAILY EDITORIAL TEAM Across the world, soil scientists are trading in their shovels for something unexpected: seismic sensors. In a breakthrough ...

Read More

This simple 15-minute mindset exercise can ease anxiety, science shows

BY THE OPTIMIST DAILY EDITORIAL TEAM A growing body of research is revealing how a short, simple activity that is done in just 15 ...

Read More

3 habits of the happiest people

Think of the happiest people you know. Do you find yourself often wondering what they are doing to maintain a general level of joy? ...

Read More

Changemakers of the week: GRuB and SparkNJ

Every day on the Optimist Daily, we report on solutions from around the world. Though we love solutions big and small, the ones that ...

Read More