The document discusses the importance of environmental control in agriculture. Controlling environmental parameters such as light, temperature, carbon dioxide, and humidity allows farmers to optimize plant growth and maximize productivity. It describes various controlled agriculture systems - including greenhouses, hydroponics, vertical farming, and building-integrated agriculture - that enable year-round production and the ability to manipulate the crop's environment. Environmental control in agriculture can increase yields by 20-30% and allows production in less than ideal outdoor conditions.