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Explore the air pollution crisis in Mexico City and the deforestation issues in the Amazon Rainforest and Brazil. Discover the impact of oil-related pollution in Venezuela and the solutions being implemented. Learn about the causes and effects of these environmental problems.
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Air Pollution in Mexico City • Over20 million people live there • Second most populated city in the world--Tokyo is first • City’s population & location contribute to its bad air pollution problem • Considered to be the most polluted city in the world
Causes & Effects of Air Pollution CAUSES: • Huge population = lots of cars • High elevation--less oxygen so fuels don’t fully burn • Sierra Madre mountains surround city & trap in polluted air EFFECTS: • High level of gases that harm eyes, lungs, & the heart
Solutions • The city promotes public transportation (buses, subway). • The city is also testing buses that run on cleaner burning fuels. • They have new restrictions on car use. • They hold environment workshops to teach people about how to save the environment
Amazon Rainforest • Largest rainforest in the world • Most of the rainforest is in Brazil • Hot, humid, & rainy tropical climate • Home to a huge variety of plants, trees, insects, birds, & animals • Produces 1/3 of the Earth’s oxygen
Destruction of the Amazon Rainforest • In the 1950s, the Brazilian government began building a major highway system, opened rainforest to loggers • Brazil’s population has increased--parts of rainforest are being cut down to create farms
Results of Deforestation… • Plants & animals are losing their homes. Many are endangeredor extinct. • Loss of trees increases carbon dioxide, a gas that contributes to pollution.
Solutions… • The government is working to fix the deforestation problem by passing laws on cutting down too many trees. • What else can be done?
Oil-Related Pollution in Venezuela • One of the world’s leading producers of oil. They have been producing oil for about 100 years. • Oil production has boosted economy. • Venezuelans are motivated to keep producing and selling oil for income--and polluting.
Causes and Problems… • Oil production results in toxic wastes, air pollution, & oil spills • Venezuela’s coast is polluted with oil. • Venezuela leads South America in the production of carbon dioxide, which is a by-product of burning fossil fuels like natural gas & oil.
Problems… • Causes breathing problems for children & elderly • Contributes to air pollution • Oil spills have caused environmental damage • Hurts the fishing industry
Problems… • Oil businesses have damaged Lake Maracaibo, the largest lake in S. 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 year • Government is having to take precautions to keep water from flooding into nearby towns
Solutions… • People are becoming aware that the long term costs may be too great. • Groups are calling for renewable energy sources and for the clean-up and prevention of pollution.
