Utilizing scientific processes to build a comprehensive background in the area of air, weather, and man's use and misuse of his environment is the goal of this student text. Basic information introduces each of the 22 chapters, followed by classroom or laboratory experiments when appropriate, review questions, and ideas for further investigations and reports. Each experiment outlines materials needed, procedures to follow, and results expected. Equipment required is simple and inexpensive. Numerous illustrations and drawings within the text lend it to use in the elementary grades. (BL)