Question: Nitrate is a compound that is commonly found in the air we breathe and can also be present in water sources. However, it is important to note that while nitrogen itself is not harmful, high levels of nitrate can pose risks to human health, especially for pregnant women. Overall, this lab topic highlights how environmental challenges such as farm chemical pollution can have significant impacts on human health and social issues related to access to safe drinking water for vulnerable populations like infants and pregnant women.