In this lesson, our instructor Bryan Cardella gives an introduction on air pollution. He discusses the general effects of air pollutants, major air pollutants and the criteria, acid rain, air toxics, air pollution variability, urban air pollution, controlling pollutants and quality standards, high altitude depletion, and indoor air pollution.
Air pollutions has existed since the origin of mankind, and its sources have two major categories: stationary (point, fugitive, and area sources) and mobile sources
Air pollution affects vegetation, animals, soils, water quality, natural/artificial structures, human health, and visibility. Its effects on humans include: cancer, birth defects, eye/respiratory irritation, heart disease, and emphysema (equaling $50 billion per year in health costs.) Also, synergistic effects make it worse
Pollutants recognized by the EPA are primary or secondary, and they are classified as particulate matter or gaseous
The six most common pollutants (criteria pollutants) are sulfur dioxide, nitrogen oxides, carbon monoxide, ozone, particulate matter, and lead
Acid rain occurs when precipitation interacts with the air pollutants sulfur dioxide and nitrogen oxides. It affects forests, water, and human life
Air toxics are pollutants known (or suspected) to cause cancer (for example, hydrogen sulfide, mercury, and benzene)
Air pollution varies by from place to place, and it can vary with the time of the year. Urban air pollution is either photochemical or sulfurous smog, and the health risks of breathing urban air are drastically higher than in rural areas
Ways to control air pollution: settling chambers, catalytic converters, scrubbing, and more legislation
High altitude depletion (ozone depletion) has a lot to do with the entrance of chlorine into the atmosphere (as in CFCs.) There is a large hole in the ozone layer above Antarctica, but it has stopped growing and is patching itself up gradually thanks to legislation banning the use/release of CFCs. Polar stratospheric clouds can greatly impact the ozone layer. The environmental affects of less ozone are costly: more UV radiation penetrating through can damage food chains and lead to more cancer incidence
Indoor air pollution is a major problem. Sources include: heating units, furnaces, furniture, carpets, electronic devices, garbage containers, cleaning products, mold, etc.
Radon gas is a natural toxin that can lead to major illness or death depending on the level of exposure. Buildings can be declared “sick” because of major pollutants such as radon. In the future greater measures must be taken to control and monitor indoor air pollution
Lecture Slides are screen-captured images of important points in the lecture. Students can download and print out these lecture slide images to do practice problems as well as take notes while watching the lecture.
This book includes a comprehensive review of the key AP Environmental Science concepts and targeted strategies for acing every section of the exam. Additionally, the book includes two full length practice tests with full answer explanations.
This book is an updated manual that offers a brand-new diagnostic test to pinpoint the test taker's strengths and weak areas, two full-length practice exams with all questions answered and explained, a detailed review of all test topics, supplemented with practice questions and quizzes with answers, an overview of the test plus helpful test-taking strategies, and hundreds of diagrams and illustrations .