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Read More: Do You Need to Take Electrolytes to Stay Hydrated? Almaraz already knows a lot about what’s pouring into Americans’ toilets—so she’s focused on how to change it. She’s found that people are often unreceptive to the idea that they don’t need more protein, which means they continue to deposit too much nitrogen into the environment. That’s why she wants to help people understand the consequences of seemingly personal choices like diet—and raise awareness that pee can turn into toxic waste. “Diets can change. They change all the time,” she says. “I hope we can change them for the better.”