6 Why is the moon so much colder at night? Nighttime = -150o C (-238o F)Why is the moon so much colder at night?Earth (Beverly Hills):Nighttime = 5o C (40o F)
7 Earth Some heat escapes into space CO2 heat Some heat naturally trapped by CO2 and other greenhouse gasesCO2heatThe Natural Greenhouse Effect is good for life on Earth.heatheatCO2CO2CO2CO2CO2heatCO2CO2CO2EarthCO2CO2
9 Earth More heat trapped near Earth’s surface Less heat escapes into spaceCO2heatCO2heatheatheatheatCO2CO2CO2CO2CO2CO2CO2CO2heatCO2CO2CO2CO2CO2CO2CO2CO2Excess CO2 in atmosphereCO2CO2CO2CO2CO2EarthCO2CO2CO2CO2
10 Global Climate ChangeEffect Main Cause: CO2 released from burning of fossil fuelsEffects: Too much heat trapped near the earth’s surface may change climate patterns.Solutions: Reduce use of fossil fuels and air pollution, plant trees, use alternative energy sources.
11 Acid RainCause:Air pollution from burning fossil fuels combines with rain water.Effects:Ecosystems more acidicKills plant and animal lifeSolutions:Reduce fossil fuel usage and air pollution.Add buffer (base) to waterwaysCrushed limestone is being added to this lake to raise the pH
13 Ozone layer blocks UV radiation from the sun Ozone Layer DepletionCause:CFCs (air pollution) removes ozone.More UV radiation reaches the surfaceEffects:Crop damageSkin cancersEye damageSolution:Regulate CFCs in factory wasteplant trees.UVUVOzone layer blocks UV radiation from the sunOzone layerCFCs
14 Smog Causes: Effects: Solutions: Particulates rise into air and react with sunlight to make air pollutionEffects:Poisonous to plant and animal life (respiratory illness).Solutions:Reduce use of fossil fuelsPlant trees
15 Deforestation Causes: Harvesting/destroying forests for: Wood demand Creating farmlandEffects:Species extinctionLess CO2 removedSolutions:Recycle!Improved farming practices and technology.This used to be part of the Amazon rainforest, but rain and wind blew away much of the topsoil…creating a desert-like area.Amazon “jungle”
16 Invasive Species Zebra mussels Kudzu vines Kudzu vines Cause: Foreign species introduced to new environment.Effects:Foreign species outcompete or prey on native species.Economic damageSolutions:Laws preventing foreign plants and animals into new countriesZebra musselsKudzu vinesKudzu vines
20 Pollutants and their sources Carbon dioxide: Burning oil, coal, natural gas for energy. Decay and burning of tropical forests.Sulfur dioxide: Burning coal to generate electricity.Hydrogen fluoride and silicon tetra fluoride: Aluminum and phosphate fertilizer production, oil refineries, and steel manufacturing.Ozone: Chemical reactions of sunlight on automobile exhaust gases. Ozone is a major pollutant in smog.Methane: Burning fossil fuels, livestock waste, landfills and rice production.Nitrous oxides: Burning fossil fuels and automobile exhausts.Chlorofluorocarbons: Air conditioners, refrigerators, industrial foam.