Environmental policy of the United States Environmental Protection Agency, were people with a history of opposition to the agency they were named to head. Since the environmental movement of the 1970s, the nature of environmental issues has changed. While the initial emphasis was on conventional air and water pollutants, which were the most obvious and easily measurable problems, newer issues are long-term problems that are not easily discernible and can be surrounded by controversy. Acid deposition, in the form of acid rain and dry deposition, is the result of sulfur and nitrogen dioxide being emitted into the air, traveling and landing in a different place, and
Nitrogen dioxide poisoning likely to develop within the alveolar ducts, tiny ducts that connect the respiratory bronchioles to alveolar sacs, each of which contains a collection of alveoli (small mucus-lined pouches made of flattened epithelial cells). The overall reaction may cause an obstructive lung disease. Meanwhile, proliferative bronchiolitis is a secondary effect of nitrogen dioxide poisoning. The EPA have some regulations and guidelines for monitoring nitrogen dioxide levels. Historically, some states in the U.S including Chicago, Northeast corridor and L.A have had high levels of nitrogen dioxide. In 2006, the WHO estimated that over 2 million deaths result annually from air pollution in