JaguarNation99
That's Dr. JN99 to you...
Various scientific scenarios have been theorized on the effects of an asteroid or comet's collision with Earth. An applicable scenario theorizes a chemical change in the atmosphere due to "heat shock" during entry and/or impact of a large asteroid or comet, reacting Oxygen and Nitrogen in the atmosphere to produce Nitric Acid rain. The bitterness produced by the Wormwood Star upon a third of theEarth 's potable waters could be the Biblical prediction of "acid rain" from the "heat shock" of a large comet or asteroid's impact withEarth.
The Hooper Natural Science Museum in Ottawa, Canada cites the theorized "atmospheric chemical changes" from the impact of an asteroid or comet with the Earth. See the statement below:
When an asteroid enters earth's atmosphere there are two occurrences of extreme shock. The first occurs as the asteroid enters the atmosphere. The second, more important one, occurs when the ejecta plume (the ejected debris caused by an impact) enters the atmosphere (Zahnle, 1990). This shock causes the breakdown of the oxygen (O2) and the nitrogen (N2) molecules found in our atmosphere. Through a series of chemical reactions the dissociation of the nitrogen and oxygen forms NO which is then converted into NO2. These two molecules can produce acid rain (HNO3) (Prinn and Fegley, 1987). In 1987 Prinn and Fegley determined the atmospheric consequences of a "large" comet impact versus a "small" comet impact. They assumed the "large" impact comet had a mass of 1.25 x 1016 Kg traveling at a velocity of 65 Km/s. As for the "small" impact asteroid, they assumed it had a mass of 5 x 1014 Kg traveling at a velocity of 20 Km/s. It is important to note that these two objects are possible bolides that hit the earth 65 million years ago. http://www.scienceblog.com/cms/bible-truths-12700.html
So you do believe pollutants in the atmosphere can affect the climate. That is all.