Presentation on theme: "KEY CONCEPT Fossil fuel emissions affect the biosphere."— Presentation transcript:
1 KEY CONCEPT Fossil fuel emissions affect the biosphere.
2 Pollutants accumulate in the air. Pollution is any undesirable factor added to the air, water, or soilExamples:Pollution from factoriesHousehold chemicalsExhaust from carsCan be immediate ordelayedChloroflourocarbons
3 Most common air pollution is from burning fossil fuels such as coal, oil and natural gas Smog is one type of air pollution.sunlight interacts with pollutants in the airpollutants produced by fossil fuel emissionsmade of particulates and ground-level ozoneSmog can be harmful to human health.
4 Smog can be harmful to human health. “Ozone” Acid rain is caused by fossil fuel emissions.produced when pollutants in the water cycle cause rain pH to dropcan lower the pH of a lake or streamcan harm trees
5 Air pollution is changing Earth’s biosphere. The levels of atmospheric carbon dioxide rise and fall over time.High levels of carbon dioxide are typical of Earth’s warmer periods.
6 sunlight penetrates Earth’s atmosphere The greenhouse effect slows the release of energy from Earth’s atmosphere.sunlight penetrates Earth’s atmosphereenergy is absorbed and reradiated as heatgreenhouse gases absorb longer wavelengthsGreenhouse gas molecules rerelease infrared radiationmethane (CH4)water (H2O)carbon dioxide (CO2)
8 Global warming refers to the trend of increasing global temperatures. Over the past 100 years, the average global temperature has risen 0.6 degrees CelsiusResult of increased levels of greenhouse gases such as carbon dioxide, water, and methaneNorth Pole
10 What is the Earth’s population? Ticket out the DoorWhat is the Earth’s population?What are four ways humans have caused the carrying capacity of Earth to increase?What is a nonrenewable resource?What is a renewable resource?What is a sustainability?What is an ecological footprint?