The short answer is: If you look at the facts, growing in soil is no longer a sustainable way to grow food for the 7 billion people on the planet. We recommend Vertical Farm by Dickson Despommier for an in depth understanding of the crisis at hand.
The long answer is:
To understand aeroponics, first let’s look at what plants do.
What foods do plants eat? Do they eat sunshine, minerals, fertilizer, microorganisms, dead animals, cow dung, water, miracle-gro? What do they eat?
The answer is plants don’t eat anything. Very simply put, a plant utilizes the four elements:
Photosynthesis:Carbon dioxide + water + light = sugar + oxygen
Then they burn this sugar to make everything else that makes up a tree. Photosynthesis is the basis of life. Plants then feed the animal kingdom one way or another as they are the major source of sugar or carbohydrates needed for animal metabolism.
Today we know that we can substitute sunlight with the exact wavelengths of light that the plant will best utilize. Using artificial light when sunlight isn’t available makes it easy to grow food all year long in any location. You can find grow-lights online or at a grow shop near you.
We can directly feed the plant the minerals and nitrogen it needs without the unnecessary chemicals found in fertilizers. Tim Blank has spent many years researching at the Epcot Land Pavilion at Disney and NASA to figure out exactly what minerals are needed for maximizing plant nutrition and human nutrition. Traditional gardening with soil is either missing minerals today, or it requires a lot of knowledge about fertilizers, micro-organisms to break down organic plant and animal matter to make minerals accessible to plants, etc. We don’t need the soil or the microorganisms in aeroponic growing.
Aeroponic growing is the latest development in hydroponic growing as the roots are not constantly submerged in water. A timer water-drip system allows for the roots to be periodically exposed to water and then air. This increases the rate of growth.
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