Question
$20.00 Three environmental issues that impact you (part 1) 1-2 para per issue
- From Biology: Ecology-and-Environmental-Science
- Closed, but you can still post tutorials
- Due on Oct. 23, 2011
- Asked on Oct 20, 2011 at 12:40:02PM
Q:
For MRNICEGUY -- Only
Hello, I saw that you helped another student this past Summer with a similar assignment. I was hoping to get some help with this as well - but I need an original. I have uploaded the requirements to mediafire and you can view them at this url -- http://www.mediafire.com/?gb1neupws3evidq
This is an ongoing assignment and I am hoping to get original support throughout, This first part is due by Saturday at midnight.
I hope to hear back from you soon
$20.00
Organic Food, Acid Rain and Whaling. The Best Answer You Can Get
- This tutorial was purchased 1 time and rated C- by students like you.
- Posted on Oct. 22, 2011 at 08:23:40AM
A:
Preview: ... of precipitation and dry particles fallout is called acid deposition. In the late 1960s, Swedish scientist Svante Oden first documented the acidification of lakes in Scandinavia and traced it to air pollutants originating in other parts of Europe and Great Britain. Since then, careful monitoring has shown broad areas of North America, as well as most of Europe and other industrialized regions of the world, have been experiencing precipitation that is between 10 and 1000 times more acidic than usual. It has affected ecosystems in diverse ways.
In the absence of any pollution, rainfall is normally somewhat acidic, with a pH of 5.6, because carbon dioxide in the air readily dissolves in, and combines with, water to produce carbonic acid. Acid precipitation, then, is any precipitation with a pH less than 5.5.
Unfortunately, acid precipitation is now the norm over most of the industrialized world. The pH of rain and snowfall over a large portion of eastern North America is typically below 4.6, reflecting the west to east movement of polluted air from Midwest and industrial Canada. Many areas in this region regularly receive precipitation having a pH of 4.0 and, occasionally, as low as 3.0. Fogs and dews can be even more acidic. In mountain forests east of Los Angeles, scientists found fog water of pH 2.8 – almost 1000 times more acidic than usual – dripping from pine needles. Acid precipitation has also been heavy in Europe, from the British Isles to Central Russia. It is now documented in China and Japan as well.
Chemical analysis of acid precipitation reveals the presence of two acids, sulfuric acid and nitric acid, in a ratio of about two to one. As we know, burning fuels produce sulfur dioxide and nitrogen oxides, so the source of acid deposition problem is evident. These oxides enter the troposphere in large quantities from both anthropogenic and natural sources. Once in troposphere, they are oxidized by hydroxyl radicals to sulfuric and nitric acids, which dissolve readily in water or adsorb to particles that are brought down to Earth in acid deposition. This happens within a week of the oxides’ entering the atmosphere.
Natural sources contribute substantial quantities of pollutants to the air including 50 to 70 million tons per year of ...
The full tutorial is about 1798 words long plus attachments.
Organic Food, Acid Rain And Commercial Whaling.doc (34K)