Solar and wind power have one thing in common besides being renewable: When the sun isn’t shining or the wind isn’t blowing, they don’t generate electricity. But artificial photosynthesis may someday help change that. Battery storage is being developed as a way to feed renewable power onto the power grid regardless of the weather or the time of day, to lessen reliance on carbon-emitting fossil fuels. But some scientists are looking to plants and trees for another solution — using a man-made leaf that can turn solar energy into fuel in the form of liquid sugars or carbohydrates. In nature, plants use energy from the sun and convert it into chemical energy to be used later. Scientists at...
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