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Investigate the effectiveness of landfills in disposing of solid waste. Lab Kit for 40 students. Build your own mini-landfill, investigating the biodegradability of various wastes in a sanitary versus an open configuration. Using the results, the class determines the advantages and disadvantages of these two standard types of landfills and explores their long-term effects on the environment. Additionally, they explore alternatives to landfills, such as composting and recycling.