This document discusses how to obtain high tomato yields of 100 kg per m2 or more per year. It identifies several key factors for high yields: 1) Modern greenhouse technology that provides high light transmission, precise climate control, and semi-closed structures; 2) Advanced cultivation techniques like high wire systems and grafting that allow year-round production; and 3) High-yielding tomato cultivars developed through breeding. It also examines specific techniques like using diffuse light, precise temperature and humidity control, and supplemental CO2 that optimize growing conditions for photosynthesis and fruit production. The document concludes that combining state-of-the-art greenhouses, cultivation methods, and tomato varieties has allowed yields to increase dramatically in recent decades.