Today’s Solutions: April 21, 2026

In a traditional solar fuel reactor, the process depends upon the solar thermal heat provided by the sun. When the sun disappears at night, so too does its energy. That’s why scientists have developed the world’s first solar fuel reactor that is able to function at night by relying on solar and thermal energy storage. Though still in its early stages, a full-scale all-hours solar fuel reactor would allow for low-impact access to clean hydrogen fuel when fully developed and deployed.

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Germany’s coal mines are now Europe’s largest lake district

BY THE OPTIMIST DAILY EDITORIAL TEAM When the last miners left the open-cast lignite pits of eastern Germany’s Lusatia region, they left behind craters ...

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AI helps restore Rembrandt masterpiece that was disfigured 300 years ago

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A new way to stack bricks could help clean Bangladesh’s air

BY THE OPTIMIST DAILY EDITORIAL TEAM In the cool, dry winters of Bangladesh, the country’s 8,000-plus brick kilns roar to life. Coal-fed and open-air, ...

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