![A crop duster spraying pesticide in California A crop duster spraying pesticide in California](/sites/default/files/styles/large/public/5-4-img1498.jpg?itok=DbeUUYcd)
A crop duster spraying pesticide in California
Source: USDA photo by Charles O'Rear
Wheat in the Hulah Valley, an agricultural region in Northern Israel
Source: Carol Spears
![Irrigation of a cotton field Irrigation of a cotton field](/sites/default/files/styles/large/public/4-4-img1516.jpg?itok=z4KksvNy)
Irrigation of a cotton field
Source: U.S. Department of Agriculture
![Ug99 stem rust on a wheat stalk. Ug99 is currently one of the most dangerous threats to global wheat production. Ug99 stem rust on a wheat stalk. Ug99 is currently one of the most dangerous threats to global wheat production.](/sites/default/files/styles/large/public/4-4-img1517.jpg?itok=Mm7fxK29)
Ug99 stem rust on a wheat stalk. Ug99 is currently one of the most dangerous threats to global wheat production.
Source: USDA photo by Yue Jin
![Norman Borlaug, the "father of the Green Revolution" Norman Borlaug, the "father of the Green Revolution"](/sites/default/files/styles/large/public/4-4-img1518.jpg?itok=ayJk3pOQ)
Norman Borlaug, the "father of the Green Revolution"
Source: U.S. Department of Agriculture
![Entrance to the Svalbard Global Seed Vault Entrance to the Svalbard Global Seed Vault](/sites/default/files/styles/large/public/4-4-img1519.jpg?itok=SluhBQjT)
Entrance to the Svalbard Global Seed Vault
Source: photo by Mari Tefre
![Rendering of the layout of the Svalbard Global Seed Vault Rendering of the layout of the Svalbard Global Seed Vault](/sites/default/files/styles/large/public/4-4-img1520.jpg?itok=R0LxrZiC)
Rendering of the layout of the Svalbard Global Seed Vault
Source: Global Crop Diversity Trust
![Storage shelves in the Svalbard Global Seed Vault Storage shelves in the Svalbard Global Seed Vault](/sites/default/files/styles/large/public/4-4-img1521.jpg?itok=eEWMRj2I)
Storage shelves in the Svalbard Global Seed Vault
Source: photo by Mari Tefre
![Seeds in storage at the Svalbard Global Seed Vault Seeds in storage at the Svalbard Global Seed Vault](/sites/default/files/styles/large/public/4-4-img1522.jpg?itok=XfkJvR0x)
Seeds in storage at the Svalbard Global Seed Vault
![Banaue rice terraces in the Philippines, where traditional landraces have been grown for thousands of years. Banaue rice terraces in the Philippines, where traditional landraces have been grown for thousands of years.](/sites/default/files/styles/large/public/4-4-img1523.png.jpg?itok=zklHxjV2)
Banaue rice terraces in the Philippines, where traditional landraces have been grown for thousands of years.
Source: Public Library of Science
![Full-grown maize plants Full-grown maize plants](/sites/default/files/styles/large/public/4-4-img1524.jpg?itok=AGAyRKe7)
Full-grown maize plants
Source: photo by Christian Fischer
![Maize kernels Maize kernels](/sites/default/files/styles/large/public/4-4-img1525.jpg?itok=ZVQeHxdF)
Maize kernels
Source: photo by Andrew Butko
![Unusually colored and shaped maize from Latin America Unusually colored and shaped maize from Latin America](/sites/default/files/styles/large/public/4-4-img1526.jpg?itok=5eOupLBW)
To increase the genetic diversity of U.S. corn, the Germplasm Enhancement for Maize (GEM) project seeks to combine exotic germplasm, such as this unusually colored and shaped maize from Latin America, with domestic corn lines.
Source: USDA photo by Keith Weller
![Wheat is processed into a variety of familiar foods Wheat is processed into a variety of familiar foods](/sites/default/files/styles/large/public/4-4-img1529.jpg?itok=f2FCaA0k)
Wheat is processed into a variety of familiar foods
Source: USDA photo by Keith Weller
![A wheat harvest in Idaho A wheat harvest in Idaho](/sites/default/files/styles/large/public/4-4-img1530.jpg?itok=VavcQt5X)
A wheat harvest in Idaho
Source: U.S. Department of Agriculture
The Great Famine, or Irish Potato Famine, is one historical example of the dangers of monoculture.
Source: Drawing by James Mahoney, printed in the Illustrated London News
![A memorial to the Irish Great Famine in Dublin A memorial to the Irish Great Famine in Dublin](/sites/default/files/styles/large/public/4-4-map1533.jpg?itok=9SUje-NT)
A memorial to the Irish Great Famine in Dublin
![Varieties of potato, a staple food in the U.S. and elsewhere Varieties of potato, a staple food in the U.S. and elsewhere](/sites/default/files/styles/large/public/4-4-img1535.jpg?itok=kYzstbNq)
Varieties of potato, a staple food in the U.S. and elsewhere
Source: by Scott Bauer
![An agricultural image dated around 1200 BCE An agricultural image dated around 1200 BCE](/sites/default/files/styles/large/public/4-4-img1536.jpg?itok=Lxnlxu2w)
An agricultural image dated around 1200 BCE
Source: the Yorck Project
![A potato harvest in Idaho around 1920 A potato harvest in Idaho around 1920](/sites/default/files/styles/large/public/4-4-img1537.jpg?itok=2QrZf1gC)
A potato harvest in Idaho around 1920
![A colorful combination of different rice strains A colorful combination of different rice strains](/sites/default/files/styles/large/public/4-4-img1538.jpg?itok=5WisD0zr)
A colorful combination of different rice strains
Source: International Rice Research Institute
![Women work on an Indonesian rice plantation Women work on an Indonesian rice plantation](/sites/default/files/styles/large/public/4-4-img1539.jpg?itok=kZt20hEH)
Women work on an Indonesian rice plantation
Source: Gunawan Kartapranata
![Physicist and environmentalist Vandana Shiva Physicist and environmentalist Vandana Shiva](/sites/default/files/styles/large/public/4-4-img1544.jpg?itok=4r3mMW1i)
Physicist and environmentalist Vandana Shiva
Source: Elke Wetzig