This story appears in the November 2017 issue of National Geographic magazine. Name the last place where you saw seaweed on the menu, not including a Japanese restaurant. Drawing a blank?

The way Acadian harvest the seaweed ensures it grows back every year so it recaptures carbon as it regrows, they explain. In the same way you prune a ... survived even in bad soil conditions.” ...

Wondering what the seaweed is like in Playa del Carmen? You’ve come to the right guide! I hate to be the bearer of bad news ...

His firm is among a wave of seaweed farms that have sprung up in Europe and North America, spurred by a growing demand from the food industry and others. "You have a biomass that can be used for ...