Latin America’s Environmental Concerns. Unit 7. #1 Air Pollution in Mexico City. second most populated city in the world--Tokyo is first nearly 20 million people live here city’s population & location contribute to its bad air pollution problem - PowerPoint PPT Presentation
Latin Americas Environmental Concerns
Latin Americas Environmental ConcernsUnit 7#1 Air Pollution in Mexico Citysecond most populated city in the world--Tokyo is firstnearly 20 million people live herecitys population & location contribute to its bad air pollution problemconsidered to be the most polluted city in the world#2 Air Pollution Over Mexico City
#3 Air Pollution Over Mexico City
#4 Causes of Air Pollutionhuge population = lots of carshigh elevation--less oxygen so fuels dont fully burn--higher level of gases that harm eyes, lungs, & the heartSierra Madre mountains surround city & trap in polluted air#5 Surrounded by Mountains
#6 SolutionsTo reduce air pollution, the city promotes public transportation (buses, subway).The city is also testing buses that run on cleaner burning fuels.new restrictions on car useworkshops to teach people about the environmentHow does geography play a role in Mexico Citys air pollution problem?It is one of the worlds largest cities.The city has views of distant snowcapped mountains.It lies in a bowl-shaped valley that traps air pollutants.The cars and factories send pollution such as lead, sulfur, and carbon monoxide into the air.
What are the main sources of air pollution in Mexico City?Intense sunlightThe high altitudeFactories and carsCars that produce little or no air pollution.Which solution is a way that the government is trying to reduce pollution in Mexico City?Ignoring cars with exhaust problemsReducing the number of buses and trainsMaking sure the population continues to grow.Increasing the number of cars that produce little or no air pollution.
Which solution to Mexico Citys air pollution problem would be most challenging to businesses?Closing factories 1 day a weekUsing fuels that produce less pollutionHaving employees ride trains or buses to workAsking citizens to leave their cars at home 1 day a week
#7 Amazon Rainforestlargest rainforest in the worldmost of the rainforest is in Brazilexperiences a hot, humid, & rainy tropical climatehome to a huge variety of plants, trees, insects, birds, & animalsproduces 1/3 of the earths oxygen
Go to WWW.Brainpop.com and watch the video on Tropical Rainforests#8 Amazon Rainforest
#9 Destruction of the Amazon RainforestIn the 1950s, the Brazilian government began building a major highway system.opened rainforest to loggersBrazils population has increased--parts of rainforest are being cut down to create farms
#12 Results of DeforestationPlants & animals are losing their homes; many are endangered, and some are becoming extinct.Loss of trees increases carbon dioxide, a gas that contributes to global warming.
#16 SolutionsThe government is working to fix the deforestation problem by passing laws on cutting down too many trees.What else can be done?Which is a problem associated with deforestation?More oxygen is available on the planet.Poor people earn money from selling trees.Native people have too much forest for their needs.There is less forest to produce goods that humans need.Why does deforestation increase when the value of crops and cattle go up?The value of timber goes up.Laws to protect the rainforest are not enforced.People think they can make more profit selling cattle and crops.Environmental groups work with the government only when prices are down.
What is the main crop grown in areas of deforestation?CocoaRubberSoybeansBrazil nutsThe world gets about 20% of which resource from the Amazon Rain Forest?MedicineOxygenRubberSoybeans
Use the graph on pg. 18 of your CRCT book to answer questions 17-20#17 Oil-Related Pollution in VenezuelaOne of the worlds leading producers of oilhas been producing oil for about 100 yearsOil production has boosted economyMain source of income for many peopleOil production results in toxic waste, air pollution, & oil spills
#18 ProblemsVenezuelas coast has become polluted with oil.oil spills have damaged the environmenthurts the ability of fishermen to earn a living
#19 Result of Drilling for Oil
#20 ProblemsVenezuela leads South America in the production of carbon dioxide, which is a by-product of burning fossil fuels like natural gas & oil.can cause breathing problems for children & elderlycontributes to global warming#21 ProblemsOil businesses have damaged Lake Maracaibo (largest lake in South America).Large amounts of oil have been removed from the area so the land is changing.eastern shore of the lake is dropping about three inches a yeargovernment is having to take precautions to keep water from flooding into nearby towns
#22 Why oil?Money from selling oil is the countrys main source of income.Venezuelans are motivated to keep producing, selling, and burning oil--and polluting.#23 SolutionsPeople are becoming aware that the cost in the long term may be too great.Groups are calling for renewable energy sources and the clean-up and prevention of pollution.What problem has been caused by oil production in Venezuela? About 15% of US oil comes from VenezuelaThe coast along the Caribbean Sea has been polluted with oilLake Maracaibo has become the largest lake in South AmericaVenezuela is more polluted than other South American countriesWhy might the Venezuela government NOT want to stop oil production in the country, even though it causes a lot of pollution?The government gets about half of its money from the oil business.The government does not care about damage to the environment.People along Lake Maracaibo are now protected by a dike to prevent flooding.People in Venezuela dont care about the environment as much as other people.
Who is affected first by carbon dioxide pollution?Healthy adultsChildren and the elderlyFarmers along Lake MaracaiboFisherman along the Caribbean coastSome scientists believe that increases in carbon dioxide contribute toAlgal bloomOil slicks on the Caribbean coastGlobal warmingClear cutting