Air Pollution Talk

Ozone is a gas that occurs in two layers in the sky. It can be “good” or “bad” for your health and the environment. This depends on where it’s located. The layer closest to the Earth’s surface is the troposphere. Here, ground level or “bad” ozone pollutes the air. It is harmful to breathe and damages crops, trees, and other plant life. Bad ozone is one of the main parts of urban smog. It is of greatest concern during the summer months because strong sunlight and hot weather result in harmful ozone levels in the air we breathe. Many urban and suburban areas have high levels of “bad” ozone. Breathing in “bad” ozone can trigger many health problems, such as:

* chest pain
* coughing
* throat irritation
* congestion

It can worsen bronchitis, emphysema, and asthma. Being exposed over time can even scar lung tissue. Healthy people also have problems breathing when exposed to ozone pollution. Because ozone forms in hot weather, anyone who spends time outdoors in the summer may be affected. This includes children.

The troposphere extends up about six miles. Here it meets the second layer, or the stratosphere. The stratosphere or “good” ozone layer extends upward from about six to 30 miles. It protects us from the sun’s harmful ultraviolet, or UV rays. “Good” ozone is made naturally. But man-made chemicals can destroy it. The substances that destroy it were mostly used in the past in coolants, pesticides, and fire extinguishers. Once released into the air, these substances break down very slowly for years. When they reach the stratosphere, the sun’s ultraviolet (UV) rays break them down. This destroys “good” ozone and causes higher amounts of UV rays to reach the Earth. This can lead to more cases of skin cancer, cataracts, and impaired immune systems in people. UV can also damage sensitive crops, such as soybeans, and reduce crop yields.

Source: U.S. Department of Health and Human Services

“Acid rain” is a term used to describe the many ways in which acids fall from the sky. Rain, snow, fog, dry gases, and particles may contain acids. Sulfur dioxide and nitrogen oxides released by power plants, cars and trucks, and other sources cause acid rain. Acid rain harms plants, animals, fish, and building surfaces. It can also create smog in the air and hurt people’s lungs.

Since the energy used to power modern life (electricity and burning fuels like gas and oil) is the main cause of acid rain, there are many things you can do to stop or reduce its effects.

* Turn off lights, computers, and other appliances when you are not using them.
* Only use electrical appliances when you need them.
* Keep your home well insulated.
* Carpool, use public transportation, or walk or bike when you can.
* Use appliances that are energy efficient.
* Buy vehicles that only give off low levels of nitrogen oxide. Look for electric- or gas- powered or alternative-fueled cars.

Source: U.S. Department of health and Human Services

Proportional to body weight, children eat, breathe, and drink more than adults. So they take in higher concentrations of the toxins in our environment. As children’s bodies develop, especially in the womb and newborns, they are vulnerable to damage from toxic substances. For example, a small amount of certain pesticides during a critical time in a child’s development could impact brain and body function, causing ADHD, reproductive health problems, as well as other problems. Some toxins, like mercury, can build up in body fat and be passed from mother to child during pregnancy or after birth through breast milk.

Office on Women’s Health