Pollutants that exist in outdoor environments can easily enter our air indoors. Water is one of the most important substances on Earth. Every plant and animal on Earth needs water to live. Without water, humans would die. Some plants and animals spend their entire lives in water and rely on it for survival.
Water is essential for healthy living both indoors and outdoors.
Drinking water enters our homes, schools, and office buildings through one set of pipes and exits through a separate set of pipes. Heat is an idea that most of us take for granted. Heat can be produced by burning fossil fuels, such as natural gas, propane gas, or fuel oil. In newer buildings, heat pumps are used to produce heat. Heat is essential for healthy indoor living.