Agricultural and biological engineers ensure that we have the necessities of life. They help provide safe and plentiful food and water, clean fuel and energy sources, and a healthy environment. 

Agricultural and biological engineers. . .

• Devise practical, efficient solutions for producing, storing, transporting, processing, and packaging agricultural products
• Solve problems related to systems, processes, and machines that interact with humans, plants, animals, microorganisms, and biological materials
• Develop responsible, alternative uses of agricultural products, byproducts, and wastes and of our natural resources—soil, water, air, and energy

And they do all this with a constant eye toward protecting people, animals, and the environment.