grade 7 geography: natural resources around the world, use and sustainability
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Resources for our Future
Resources for our FutureGrade 7 Geography: Natural Resources Around the World, Use and SustainabilityResources for our FutureAs we learned from our presentations, many of Earths resources are not renewable. Even our renewable resources can be depleted if not managed correctly.Wise action can restore the health of the earth.Think globally, act locally.Sustainable DevelopmentDefinition of sustainable development: gathering and processing resources, then disposing of waste without harming the earth; and consuming resources at a rate that saves plenty for future generations to useSustainable DevelopmentOur throw-away society often does not practice sustainable development.
Sustainable DevelopmentTwo ways of helping sustain our resources are:1. Conservation of Resources2. Energy AlternativesConserving Renewable ResourcesConservation: saving the earths natural resources by protecting them and using them in sustainable ways
The following slides discuss examples of conserving natural resources.Conserving Renewable ResourcesAquaculture (fish farming): raising fish in enclosures set in the edge of water bodies
Pros: efficient, cost effective way of providing fish to consumersConserving Renewable Resources
Conserving Renewable Resources
Conserving Renewable ResourcesCons to Aquaculture: poor water quality can lead to toxic build upWaste build up, especially in overcrowded conditions can lead to infections, cancer and sea lice which in turn are treated with chemicals to what effect?Fish are confined in tight spaces (cruelty?)Diseases can be passed onto wild fish
Conserving Renewable ResourcesForests: Buying Green selecting products that have been made in a way that is not harmful to the environmentFSC Forest Stewardship Council is made up of representatives from the forest industry and environmental groups of 25 countries . They certify products that have been produced with sustainability in mind. Conserving Renewable ResourcesHome Depot was one of the first retailers to embrace FSC products. (Why?)
Conserving Renewable ResourcesPreserving Habitat: Help protect speciesThere are over a million different types of living things on earth. Everything holds an important place in the food chain.Endangered species are a threat to the balance of life.The biggest threat to species is loss of habitatConserving Renewable ResourcesOrganizations such as World Wildlife Fund campaign to preserve the diversity and abundance of life on earth and the health of ecological systems.
Conserving Renewable ResourcesIn the 1980s the United Nations recommended that every country set aside one-tenth of its territory as protected area.Costa Rica in Central America is a world leader at 25% of its territory protected. (Canada is at about 9.5%)Parklands are an effective way to protect species and maintain the health of the planet.National Parks in Canada
Energy AlternativesAs we have learned in this unit, fossil fuels provide most of our energy, yet is the reason for many of the problems affecting the health of the planet.There are two main solutions to the problems of fossil fuel resource use:1. energy conservation2. new power technologiesEnergy AlternativesEnergy Conservation: In the science unit, Interactions in our Environment, we learned many ways to conserve energy. What are some ways you can help conserve energy?
New Energy AlternativesHybrid cars use both gasoline and electricity, making them very energy efficient
New Energy AlternativesFuel cells use hydrogen fuel which is a fuel combined with oxygen and air to produce electricity without any burning. It is made from plants such as corn.
New Energy AlternativesSolar Power uses the sun to convert sunlight into electricity which is stored in batteries.
New Energy AlternativesGeothermal systems use the more constant temperature underground to keep homes warm in the winter and cool in the summer. A heat pump moves fluid through the underground pipes. (see diagram on next slide)New Energy Alternatives
New Energy AlternativesWindpowerWestern Europe has invested heavily wind power, especially the Netherlands. Canada is beginning to use this resource more.
New Energy AlternativesTidal PowerAs tides rise and fall, moving seawater spins large turbines linked to electrical generators. A difference of at least 5m is needed between high and low tide.