Last winter’s El Niño may have felt weak to residents of Southern California, but it was one of the most powerful weather events of the last 145 years, scientists say.

If severe El Niño events become more common in the future, as some studies suggest, the California coast -- home to more than 25 million people -- may become increasingly vulnerable to coastal hazards, independently of projected sea level rise.

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Duke University researchers have developed tiny nanoparticles that help convert carbon dioxide into methane using only ultraviolet light as an energy source.

Having found a catalyst that can do this important chemistry using ultraviolet light, the team now hopes to develop a version that would run on natural sunlight, a potential boon to alternative energy.

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