Every day, the 1. ____________ person inhales about 20,000 liters of air. Every time we breathe, we risk our life in 2. ____________by inhaling harmful chemicals that have found their way into the air.
Air pollution includes all contaminants found in the atmosphere. These dangerous substances can be either in the form of gases or particles.
Air pollution can be found both outdoors and indoors. 3. ____________can be trapped inside buildings, causing indoor pollution that lasts for a long time.
The sources of air pollution are both natural and human-based. As one might expect, humans have been producing 4. _____________ amounts of pollution as time has progressed, and they now account for the majority of pollutants released into the air.
Air pollution has been a problem throughout history. According to Roman 5. _______________, even in Ancient Rome people complained about smoke put into the atmosphere.
The 6. _____________ of air pollution are diverse and numerous. Air pollution can have serious consequences for the health of human beings, and also severely affects 7. _____________ ecosystems. Air pollution can also 8 _____________ and 9. ____________________ diseases.
Because it is located in the atmosphere, air pollution is able to travel easily. As a result, air pollution is a global problem and has been the subject of global cooperation and conflict.
Some areas now 10 __________________ more than others from air pollution. Cities with large numbers of automobiles or those that use great quantities of coal often encounter severe problems of air pollution.