Efforts to cut carbon dioxide emissions and energy costs are giving rise to . . . poo power! That’s right – for the past few years engineers have been implementing new ways to convert waste products into usable biofuels. The process involves a series of chemical reactions know as anaerobic digestion, which ultimately produces a biogas composed largely of methane and carbon dioxide.

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Like to eat? Give thanks to agricultural engineers. They mix cutting-edge science with the art of farming to keep us well-fed with foods that are safe, nutritious and tasty. Agricultural engineers will never be at a loss for career choices because the number of industries that require their skills is vast.

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Coming into Virginia Tech’s engineering program, Angela Walker knew that as a woman, she would be in the minority. That’s why she chose to live in Hypatia, an all-female engineering community, her first two years. “Nothing can replace the ability to walk down the hallway and get help on homework,” says Walker, now a junior majoring in mechanical engineering. “If it weren’t for the network of people you meet through this program, many girls might feel intimidated to the point that they decide to drop out of engineering,” she says. “We empower each other.”

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World hunger could worsen as cropland becomes scarcer and the Earth’s population increases. A Columbia University environmental health scientist thinks the solution lies in building high-rise, indoor farms right in the heart of the world’s cities.

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Who’s Who in Engineering

Here’s our handy guide to famous engineers, which includes some familiar faces and others who may be new to you. For a list of young engineers who are already on their way to changing the world, check out our Trailblazers section

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