Today’s Solutions: December 19, 2025

The berries of the Jamun tree are popular in India. The fruit is known for its nutritional and medicinal value. It’s cheap and often sold on pavements and at traffic junctions. But Indian researchers have found a new benefit in the berries: They may be used to make solar panels far less expensive. The berries have a pigment that is very efficient in absorbing large amounts of sunlight. Most solar cells today are made of either single crystal silicon or polycrystalline silicon. While polycrystalline is more efficient, it is also more expensive. The scientists believe that the pigment of Jamun berries could bring down solar panel costs.

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