Students examine and identify biodegradable and non-biodegradable materials. They discover ways in which biodegradable materials can help minimize pollution.

Fourth graders identify recyclable materials in an experiment. They discover how to properly dispose of these items. They discover how to use materials again that cannot be recycled.

Fourth graders discuss the concept of reduce, reuse and recycle. They identify products in their homes that are hazardous and discover alternatives to them. They examine the inventory of other classmates hazardous materials.