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Published byOlivia Williams Modified over 9 years ago
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_____% of our waste comes from from mining, oil & gas production, agriculture, industrial production (scrap metal, plastic, etc.)
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We are only ______% of the world's population yet we create _____% of the world's wastes
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Legal Definition of hazardous waste
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Things not included in hazardous waste
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Views waste as unavoidable, and must be handled in a way that, reduces harm Deal with waste by burying,burning, shipping off
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Waste is... - A potential resource - Harmful and should not be made in the first place
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First Priority of Waste Management - change industrial processes to eliminate the use of harmful chemicals - reduce packaging in materials and products - make products that last longer and are recyclable, reuseable, or easy to repair
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Second Priority of Waste Management - Reuse - Repair - Recycle - Compost - buy reuseable and recyclable products
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Last Priority of Waste Management - Treat waste to reduce toxicity - incinerate waste - bury waste in landfills - Release waste into environment for dispersal and dilution
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Ways to reduce waste production
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Benefits of reusing
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Primary (Closed-loop) recycling
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Secondary (Open-loop) recycling
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Used for large scale recycling, collects urban wastes and separates or shreds it; valuable materials sold to manufacturers as new materials, left-over wastes (mainly non-recyclable plastics and paper) are burned
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most recycled ITEM (56%)
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Critics view of recycling
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Proponents view of recycling
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Advantages of recycling
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Burns trash to create electricity
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we burn ____% of solid wastes and _____% of hazardous wastes
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Problems of incineration
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Benefits of landfills
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Problems with landfills -Traffic, noise, dust, smell - Slow decomposition - Little/no water & oxygen - Methane, H2S, volatile gases - Groundwater contamination - ALL LANDFILLS WILL EVENTUALLY LEAK
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First priority of managing hazardous waste which involves : - change industrial processes to reduce or eliminate industrial processes - recycle and reuse hazardous waste
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Second priority of managing hazardous waste - natural decomposition - incineration - Thermal treatment - Chemical, physical, and biological treatment - dilution in air or water
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Last priority of managing hazardous waste which includes : - landfill - underground injection wells - surface impoundments - underground salt formations
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Ways to detox hazardous wastes
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Incinerate at high temps Reduced to atoms, released as gasses (CO, CO2, toxic metals, some particulates) More complete incineration than normal
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Biological detox methods (for hazardous wastes)
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Pump hazardous waste into dry rock BELOW aqifers
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Put hazardous wastes into ponds or lagoons, solids will settle and liquids will evaporate..has many transport and leak issues
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Who didn’t sign the Basel Treaty?
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What is due next week?
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