Acid Deposition
One of the biggest environmental problems that needs dealing with in society today is acid deposition. It is largely caused by humans, and causes much pollution to the environment and harms people and buildings as well. Although there are minimal positive sides to this issue, the negatives far outweigh it and call people around the world to take action to reduce and even solve this problem. Coming in both wet and dry forms, acid deposition consists of acidic pollutants including nitrogen oxides and sulfur oxides that have been deposited from the atmosphere to the surface of the earth. There are both wet and dry forms of acid deposition, wet forms being referred to as acid precipitation. Acid precipitation is the result of sulfur and nitrogen oxides reacting in the atmosphere with water vapor. This returns to the earth as acid rain or snow. Dry deposition occurs when these oxides react without water and they settle out of the atmosphere onto the earth. Acid deposition can come from a number of different sources such as smokestacks, trucks and cars. More than 90% of the sulfur in the atmosphere comes from humans. Coal burning, the smelting of metal sulfide ores, and automobile exhaust are major human contributions to sulfur dioxide in the atmosphere. Similarly, 95% of the increased nitrogen oxide levels in the atmosphere are a result of the activities of humans. The activity that contributes the most to these elevated levels is the combustion of oil, coal, and gas. Attention was first drawn to acid deposition in the 17th century when the bad effects of industry and acidic pollution on both vegetation and people were noticed. In the 1960s, it became an international problem when fishermen noticed declines in fish numbers and diversity in lakes across North America and Europe. Acid deposition causes many problems such as these worldwide, and is clearly a problem that needs to be properly dealt with.
There are different negative affects of acid deposition to different environments on the earth. In soils where a possible buffer of basic material isn’t as great, plant nutrients are often lost, the germination of seeds and the growth of young seedlings are hurt, and plants may become over-fertilized by nitrogen. The plants in this instance often experience reduction in growth rates, flowering ability, and overall yield. This makes the plants more vulnerable to disease, insects, drought, and frost. Trees are also affected by acid deposition.
...oceans. Anthropogenic systems such as the combustion of fossil fuels since the industrial revolution have greatly increased the rate of acidification to levels where negative impacts ensue. Negative impacts occur both to marine organisms that rely on certain water conditions to maintain vital functions and the environment which is damaged by highly acidic waters. There is great variation in the acidity of each of the oceans, differences caused by the chemical composition of the ocean and biogeography. Understanding of the potential impacts of ocean acidification is relatively new to the scientific community and therefore little is known on how to counteract anthropogenic influences. Although reducing the amount of carbon dioxide produced will in turn reduce the lowering of the oceans acidity levels and reduce negative impacts on the environment and marine organisms.
Rain is naturally acidic, due to the CO2 dissolved in it, however when sulphur dioxide and oxides of nitrogen react with the rain water they form sulphuric, and nitric acids which make the rain strongly acidic. SO2 + ½O2 + H2O → H2SO4 It may also take the form of snow or fog. The sulphur dioxides and oxides of nitrogen come mainly from industry. Acid rain is currently a subject of great controversy because of widespread environmental damage for which it has been blamed, including eroding structures, injuring crops and forests, and threatening or depleting life in freshwater lakes.
In conclusion, “Acid Rain: Scourge from the Skies” was effective in proving how severe acid rain is and can be. Robert Collins wrote informatively about a notable subject what anyone can comprehend and he used many commendable writing devices which all added to the effectiveness of the essay.
Human activities have led to an exponential increase in the use of fossil fuel. The benefits of using fossil fuels are short lived in comparison to its long-term negative effects. In the last couple of decades, the major consumption of fossil fuel played a significant role in the rise of concentration of CO2 in the atmosphere. Roughly two trillion metric tons of CO2 have been emitted in the atmosphere and over a quarter of these got mixed with the ocean water resulting in ocean acidification (Buffie and Carr, 2010).
Rotting vegetation and erupting volcanoes release some chemicals that can cause acid rain, but most acid rain falls because of human activities. When humans burn fossil fuels, sulfur dioxide (SO2) and nitrogen oxides (NOx) are released into the atmosphere. If large amounts of NO2 and SO2 are present in the atmosphere than the pH of rainwater will be significantly lowered. Nitric acid (HN03) can be linked to around 1/4 of the acid rain in the environment. Large amounts of NO gas is produced by high-temperature air combustion that takes place in car engines and power plants....
Acid rain affects many different things and is very harmful to the environment. One aspect of the environment that is greatly affected by acid rain is soil. Acidic rain makes its way into the soil by rain falling off the branches and leaves to the soil below. Water runs through the soil on its way to different bodies of water. A process called buffering is used to neutralize acids using the base nutrients (including calcium and magnesium) found in soil (Tyson, 1992). This process helps soil resist the effects of acid rain.
The sulfur dioxide was regarded as the acknowledged toxic gas, and is also one of main factors for acid rain. Due to its severe toxicity, the major pollution incidents have even happened in human beings’ history. During 1st December and 15th December 1930, the toxic gases including the sulfur dioxide caused great loss for Meuse Valley in Belgium. The toxic gases led to thousands of people in the industrial zone of Meuse Valley were catched with respiratory diseases, and “nearly 63 people were dead within a week”. ( Benery B, HoetPH, Nemmar A. 2001) Additionally, many livestocks also could not survived and died of the toxic gases. In the incident, the mixture of SO2 and SO3 were the main dioxide smog. Similarly, during 26th October and 31st October in 1948, the Nonora smog in America was another sever toxic incident. (Lynne Page Snyder, 1994) The results proved that the sulfur dioxide was still the main toxic gas. Therefore, the sulfur dioxide has been proved to be the acknowledged toxic gas.
Acid rain can effect trees in several different ways. It can dissolve and wash away the minerals and nutrients in the soil. These factors in the soil help the trees to grow and is very important. Acid rain also cause the release of dangerous substances such as aluminum into the soil. Photosynthesis is also affected because of the waxy protective layer of the leaves being harmed. A combination of these effects weakens the trees which means that they can be more easily attacked by diseases and insects or injured by bad weather. It is not just trees that are affected by acid rain, other plants may also suffer.
When there is a lage amount of acid rain that falls in an area over a period of time, it can hurt the environment for all of the creatures living there. Acid rain can make a lake acidic which will most likely kill off a majority of the animals living in that lake.(McCormick 16) This happens all over the world. Michael Hopkin a reporter, and the author of “Acid rain still hurting Canada” states that, “Lakes and waterways in North America are struggling to recover from the effects of acid rain, despite reduced emissions of the pollutants that cause it. Without further cuts, it could be millennia before the worst-affected sites recover, say environmentalists.” It can also kill the animals that depend on the lake for food. When a food source that animals in an area dependon to survive gets diminished or even eliminated altogether. The animals that depended on it will either die off which will cause an even bigger problem for that area 's ecosystem, or they will need to find a new food source.If the new food that the animal found is already a food source for another animal then that causes competition for food, this may reduce the numbers of one or maybe even both animals. This all can come about because of acid rain and what it can do to the environment. On the EPA student site they have an article that shows how acid rain can affect an ecosystem 's food web. “This process continues up the entire food web. So,
Our Earth consists of many of many different components, such as land, animals, air, etc. and lately a lot of our attention has been brought to pollution and the state in which our Earth and atmosphere is in. Our ocean covers seventy one percent of the earth’s total surface area and plays a major role in our Earth’s atmosphere. (Hoegh-Guldberg, 2010) Acidification has been one of the many components that has been leading to the destruction of our surrounding oceans. (Doney, 2008)
The substances that we as human beings classify as 'pollutants' have always been present on the planet, because the earth is a closed system. The reason that these materials cause a negative impact on the environment, therefore, is not that they exist, but that they have been dispersed throughout the world's ecosystems in a very disordered fashion. To illustrate this, two pollutants of major concern will be considered, carbon dioxide (CO2) and sulphur dioxide (SO2). CO2 and SO2 are both given off when coal is burned to provide heat or to generate electricity. CO2 is the most important greenhouse gas contributing to global warming, and SO2 is the main cause of acid rain. Carbon and sulphur have no impact on the environment when they are locked up in ...
In 1994, transportation was the major source of carbon monoxide emissions (77%), nitrogen oxide emissions (46%), and lead (32%). [3] A combination of sulfur and nitrogen causes acid rain which, in 1952, caused 12,000 deaths and many ill in London, England.[4] All fossil fuels being burned produce carbon dioxide, a leading cause of the Greenhouse Effect. The Greenhouse Effect is the idea that incoming solar radiation readily penetrates the glass coverings of an ordinary greenhouse, but the outgoing infrared radiation from the interior does not.
Acid rain is when chemicals like nitrogen and sulphur-dioxide are released into the atmosphere and react with the water vapour, and acid pours in form of rain. This is very dangerous because it destroys infrastructures and some buildings, and also dissolves the human
Plant roots absorb nutrients in order to be sustained. The mineral nutrients include nitrogen and iron when they are dissolved in water. If the soil solution is too acidic or basic, some nutrients will not dissolve easily. This means they will not be available for uptake by roots and plants will be deprived of them.
Human activities add to the levels of these gasses, causing more problems. “Automobiles, heat from homes and businesses, and factories are responsible for about 80% of today's carbon dioxide emissions, 25% of methane emissions, and 20% of the nitrous oxide emissions.” (3) The increase in agriculture, deforestation, landfills, industrial production, and mining contribute a significant share of emissions also. These gases that are released into the atmosphere are tracked by emission inventories. An emission inventory counts the amount of air pollutants discharged into the atmosphere. These inventories are important in studying the affects of global warming on the Earth.