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The Effect of Air Pollution on Photosynthesis
Transcript of The Effect of Air Pollution on Photosynthesis
on Photosynthesis Photosynthesis is essential to all living things Turn the lights OFF Air pollutants:
substances that accumulate in
the atmosphere that are harmful
to living organisms. By: Jessica Perreault EX: Smog Acid rain Ozone depletion Greenhouse gases SMOG a combination of sulfur dioxide, ozone & other pollutants from burning fossil fuels - formed when a layer of cold air is trapped under a layer of warm air above it smog blocks out sunlight - chlorophyll in plants cannot access as much of the sun's energy to begin photosynthesis ACID RAIN any kind of precipitation with a pH of 5.7 or less it burns the tips of the leaves/needles, which are then shed.
washes away nutrients in the soil
releases poisonous toxins in the soil that damage roots Ozone Depletion GOOD ozone VS. BAD ozone
- Ozone in the stratosphere (good ozone) forms the ozone layer which protects living things from harmful UV radiation.
- Ozone in the troposphere (bad ozone) is a main component of smog THE GREENHOUSE EFFECT What is it? Air Pollution reduces the rate of photosynthesis - and what that means for us 1) Less oxygen and more carbon dioxide in the atmosphere 2) problems higher up in the foodchain What is it? How it affects plants: What is it? How it affects plants: What is it? the absence of ozone molecules in the stratosphere because of anthropogenic chemicals such as CFCs How it affects plants: the high light intensity of UV radiation bleaches chlorophyll, impairing its ability to absorb sunlight The Greenhouse Effect is caused by gases trapping the sun's energy and retaining it as heat in the atmosphere. This causes a global increase in temperature. How it affects plants: The increased global temperature denatures some of the enzymes required in photosynthesis
Climate change can change regular precipitation patterns that plants aren't used to Natural vs. Anthropogenic 3) reduced crop yields What are some little things WE can do to make things better? Walk short distances Ride a bike or take a bus Buy locally grown foods Plant a tree "If you think the economy is more important than the environment, try holding your breath while counting your money."
- Dr. Guy McPherson, environmental activist Economy VS. Environment Why doesn't the government take environmental protection seriously? The answer? Think of how much money is involved in the fossil fuel business. In 2006, American consumers and businesses spent $921 billion – or close to 7 percent of America’s gross domestic product – on fossil fuels, more than the nation spent on education or the military. In 2008, national expenditures on fossil fuels likely topped $1 trillion for the first time ever. Each year, more than 70 percent of this money is spent on oil. In 2007, America spent more than $360 billion importing fossil fuels, with the vast majority of that money spent on crude oil. That money is a direct transfer of wealth from American consumers to oil companies and foreign governments. For every dollar that an American household spends each year, about 10 cents is likely to go toward the purchase of energy, with most of that money spent on fossil fuels. The United States depends on fossil fuels for 85 percent of our energy supply. The United States will spend an estimated $23 trillion on fossil fuels between 2010 and 2030 should energy consumption and fossil fuel prices follow U.S. government projections – an amount equivalent to three years’ worth of income for the entire American workforce at current earning rates. The government is trying to balance the needs of the economy with the needs of the environment ... but which is more important? Works Cited: "Report: Repower America." The High Cost of Fossil Fuels. N.p., 30 June 2009. Web. 11 Jan. 2013. Conaway, Cameron. "Climate Change & Human Trafficking." Cameron Conaway. N.p., 02 Jan. 2013. Web. 11 Jan. 2013. Owen, David. "Economy vs. Environment." The New Yorker. N.p., 30 Mar. 2009. Web. 11 Jan. 2013. White, Michael A. "Atmosphere and Plants." Plant Sciences. Ed. Richard Robinson. Vol. 1. New York: Macmillan Reference USA, 2001. 59-61. Gale Virtual Reference Library. Web. 11 Jan. 2013. Works Cited Cont'd "Pollution." UXL Encyclopedia of Science. Ed. Rob Nagel. 2nd ed. Vol. 8. Detroit: UXL, 2002. 1549-1558. Gale Virtual Reference Library. Web. 11 Jan. 2013. Ogunjemiyo, Segun. "Stratospheric Ozone Depletion." Encyclopedia of Geography. Ed. Barney Warf. Vol. 5. Sage Reference, 2010. 2698-2701. Gale Virtual Reference Library. Web. 12 Jan. 2013. "Ozone." World of Earth Science. Ed. K. Lee Lerner and Brenda Wilmoth Lerner. Vol. 2. Detroit: Gale, 2003. 418-419. Gale Virtual Reference Library. Web. 12 Jan. 2013. "Acid Rain." World of Earth Science. Ed. K. Lee Lerner and Brenda Wilmoth Lerner. Vol. 1. Detroit: Gale, 2003. 1-2. Gale Virtual Reference Library. Web. 12 Jan. 2013. Berwald, Juli. "Acid Rain." UXL Encyclopedia of Water Science. Ed. K. Lee Lerner, Lawrence W. Baker, and Brenda Wilmoth Lerner. Vol. 3: Issues. Detroit: UXL, 2005. 377-383. Gale Virtual Reference Library. Web. 12 Jan. 2013. "Factors Affecting Photosynthesis." Tutor Vista. N.p., n.d. Web. 12 Jan. 2013.