I am going to examine rainwater pH in various locations in San Francisco and in the Sierra Nevada. I will use statistical tests ANOVA and Tukey-Kramer to identify if different locations have a statistically significant difference in rainwater pH. The locations I will test are my home garden/porch in SF, Mt. Rose at Sierra Nevada, Chinatown/downtown SF parking lot with engine exhaust, and an SF park with lots of trees. I will also create confidence intervals of the true mean pH of rain in these specific areas. My topic examines how different environments with different pollution levels affect rain acidity. I hope to raise awareness of how acid rain drastically affects our lives. Acid rain, which contributes to global warming, is caused mostly by human activity. When we burn fossil fuels, we release carbon dioxide, sulfur dioxide, and nitrogen oxides into the atmosphere, which mixes with oxygen, water, etc. before falling to the ground as carbonic, sulfuric, and nitric acid. Acid rain can reach our own water systems and is very spreadable (wind, etc.). Acid rain is toxic to many aquatic animals, which is dangerous because it affects the whole food chain, including humans! Acid rain makes it difficult for trees to absorb water, causing the trees to have no leaves. Trees and plants will have difficulty reproducing and will be more susceptible to disease, insects, and extreme temperatures. Therefore, it is very important to limit emission of fossil fuel gases by reducing, reusing, recycling, saving energy, planting trees, etc.
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