Pollution is a public health concern, and is considered to be any harmful material introduced to the environment. Many materials can cause such harm and are referred to as pollutants. Pollutants are ...

Researchers explain how nitrate from farming and fish ponds moves through water and pollutes freshwater lakes.

Updated global data show wildfire smoke pollution is higher than past estimates, with implications for air quality and ...

Nitrogen is an essential element for living organisms, needed to build DNA, proteins and chlorophyll. Although nitrogen makes up nearly 80% of the air we breathe, it’s availability to plants and ...

Share on Pinterest the_guitar_mann/Getty Images. Pollution occurs when a contaminant enters the environment, causing undesirable effects. There are several types of pollution, including: air pollution ...