Considering Goals. Octopot Education:
So what if you already know you want to grow your own food, herbs, or medicine, but sustainability and ecological impact on the earth is an important consideration?  Care of the earth, care of people, and managing excess are excellent ethical goals to consider even for your grow. 
In order for a system to be sustainable it needs to have connections to at least a few different elements in the larger picture.  Your grow system shouldn't be just a, "one trick pony."  Octopots don't require electricity to operate and hence use less energy.  They are reusable.  The dual root zone hybrid system also uses less water overall.  There's no irrigation runoff and thus a net reduction in the use of grow inputs (nutrients) and less pollution for the planet compared to other grow systems.
In addition to greater water conservation, growing in Octopots lends to greater connectivity with other diverse elements such as food resiliency.  Growing your own food with Octopots can provide better quality nutrient dense food along with the knowledge that zero food miles are attached to the food you eat.
Whatever your goals, be they local healthy food, less energy inputs, or conservation of your time and the resources of the planet, rest assured Octopots align with your ecological and sustainability values.