This lesson provides an introduction to the treatment of drinking water to remove harmful or distasteful substances. Topics include the history of treatment and a brief listing of treatment processes. Students can...
This lesson introduces students to the concept of toxic chemicals. Topics include a definition of the term 'toxic', factors that can affect the potential for a chemical to be harmful, and a brief overview of federal...
This site contains the following categories of information related to sustainable agriculture: Bibliographies of articles and research publications, searchable sites and databases, educational resources for elementary,...
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