Seaweed: The food and fuel of the future?

The Japanese have a simple dish. They will dip a 3 inch squared piece of seaweed in soy sauce then place it over a bowl of rice. They will use chopsticks to compress the sides downward and create bite sized portions of seaweed and rice. It is actually pretty good.

Seaweed is also part of sushi

My son eats these but I just can't