Can Algae Save the World?

Sometimes small is big

Paul Greenberg

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Algae cultures growing at New York’s Urban Assembly Harbor School oyster lab (Photo ©Paul Greenberg)

Every few years I find myself in a room packed tight with giant tubes of algae. The colors range from burnt sienna to electric Kool Aid-green. Quietly and humbly they do their work, converting sunlight to sugars and proteins, befuddling researchers with their multitudes, inviting we “advanced” humans to poke around and try figure out exactly what else we might do with these fantastical creatures.

For there’s quite a lot they already do, even if we know so very little. They make available to us half of the world’s breathable oxygen, and an equally impressive amount of the world’s carbon at one time or another passes through their membranes. One species of micro algae a creature, called Prochlorococcus, is the most abundant living thing on earth. It contains four times as many genes as human DNA — genes that could address numerous ecological problems if humans could only figure out a way to properly manipulate them. Prochlorococcus is one of the primary ways solar energy enters the ocean food web and gets transferred to higher life.

Thirty years ago, we didn’t even know Prochlorococcus existed.

To date, we have only really nibbled around the edges of the possibilities. Where I most often stumble upon these quietly bubbling tubes of algae is in facilities related to aquaculture…

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Paul Greenberg

New York Times bestselling author of Four Fish as well as The Climate Diet and Goodbye Phone, Hello World paulgreenberg.org