Presentation on theme: " Pure water has a pH of 7.0. Normal precipitation has pH of 5.6 › Due to CO 2 mixing with water vapor to make carbonic acid. Acid precipitation has."— Presentation transcript:
Pure water has a pH of 7.0. Normal precipitation has pH of 5.6 › Due to CO 2 mixing with water vapor to make carbonic acid. Acid precipitation has pH of less than 5.0 Can be in the form of rain, snow, sleet, hail, fog
SO 2 & NO x released when fossil fuels are burned. SO 2 & NO x combine with water vapor in atmosphere to make sulfuric acid & nitric acid. Can fall out of sky, run along ground, and enter water sources.
Eastern U.S. (Lake Erie & Lake Ontario) has pH of 4.2-4.8 Most of Europe 4.5-5.1 Eastern Europe and parts of Scandinavia 4.3-4.5
High Population- › higher population, more cars, more fossil fuel usage More industry › More factories putting out SO 2 & NO x Type of rocks in soil can alter pH levels › Marble/Limestone- neutralize pH › Granite- less neutralizing power
Acidification- soil pH drops due to acid precipitation › Soil nutrients are dissolved and washed away › Toxic metals (Al) are released from soil particles & taken up by plants › SO 2 can clog openings in leaves so they can’t get CO 2 to make sugar Adirondack mtns in New York
Fish are adapted to live at specific pH Acid precipitation makes water too acidic and many aquatic organisms can’t tolerate changes Aluminum that leaches out of soil can enter water, attach to fish gills, cause suffocation. Frogs can tolerate pH that is more acidic (pH 4.0) than a fish like a bass which can only live in water that is around pH 5.5
Acid snow will melt rapidly causing pH of river water to drop rapidly resulting in acid shock. › Causes massive fish kills › Fish & frog may produce fewer eggs which may not hatch › Many eggs that do hatch have birth defects.
Toxic metals can be leached out of soil by acid & be taken up by crops, water, fish which can poison humans Irritate respiratory systems Less fish = decrease in commercial fishing (people lose jobs) Dissolves building materials › Marble, limestone easily dissolved › Metals can be tarnished › Costly to repair these things.
Air pollution is released in one location and falls hundreds of miles away. Air pollution produced in northeastern US falls in southeastern Canada › Created Canada-US Air Quality Agreement (1991) to reduce emissions along border. China burns mostly coal with few if any pollution laws which affects many nearby Asian countries.
Explain how acid precipitation forms. Describe the harmful effects that acid precipitation can have on plants, soil, and aquatic ecosystems. Describe 3 ways in which acid precipitation can affect humans. Describe a way in which countries are working together to solve the problems of acid precipitation.