Agriculture is fundamental to human life on Earth. Crop production supports all aspects of agriculture, including production of livestock. Plants dominate today's biosphere. Because of their numbers, diversity, and ubiquity (on land and in water), plants are by far the most important primary producers on Earth. Through photosynthesis, plants control our atmosphere and capture the incident energy from the Sun, which provides nearly all of the chemical energy required to support the entire food chain that makes up the vast biodiversity of life on Earth.