Photo of the Day

Large bags of green algae hanging outside of a power plant in Arizona
March 18, 2021

Biofuel Bags

An October 2007 story examined the industry of biofuels. This photo shows bags of algae hanging outside of a power plant near Phoenix, Arizona. At the time, researchers planned for the green scum, fed by power plant exhaust, to soak up carbon dioxide while cranking out thousands of gallons of biodiesel each year.
Photograph by Robert Clark, Nat Geo Image Collection

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