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LC Classification is
Law -- United States -- United States (General) -- Contracts -- Government contracts. Public contracts. Purchasing and procurement -- Particular federal departments, agencies, etc. -- Environmental Protection Agency
6 - 8
Clean Water Act Definition of "Waters of the United States"
US Environmental Protection Agency presents this Advanced Notice of Proposed Rulemaking (ANPRM) on the Clean Water Act definition of "Waters of the United States," which has important ramifications for wetland...
How Humans Change the Atmosphere
This exercise, from the Environmental Science Activities for the 21st Century Project, is designed to introduce students to the idea that human activities can alter the chemistry or gaseous composition of the atmosphere...
Haz-Ed Classroom Activities for Understanding Hazardous Waste
Environmental Protection Agency provides classroom exercises and experiments for 7th through 12th grade students encouraging environmental awareness.
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