Plants are one of the world’s most cost-effective protein producers. There are thousands of proteins produced for commercial applications, from enzymes for industrial processes to therapeutic antibodies that generate billions of dollars in revenue. Traditionally, proteins have been produced using complex production systems such as cell culture, yeast, bacteria or eggs. However, the ability to produce proteins in plants has several major advantages. Plants are uniquely capable of efficient protein expression at high yields and low costs. Greenhouse-based manufacturing facilities conditions can be quickly built for rapid and economic scale-up in order to meet market demands.