Agriculture has for fed the world for thousands of years and supplied enormous quantities of food to meet the needs of Earth's burgeoning population. But conventional agriculture has also caused a lot of problems, called externalities, such as massive deforestation, water scarcities, biodiversity loss, soil depletion, and greenhouse gas emissions. Because of these externalities, agricultural practices are often less than sustainable. Agroecology, the subject of the Season 3, Episode 16 ...