This resource is a KWL Sheet for AP Environmental Science – Unit 7.2 (Photochemical Smog).AP Environmental Science: STB-2.B Explain the causes and effects of photochemical smog and methods to reduce it.With this sheet, students will fill in a KWL sheet related to photochemical smog. What you KNOW, What you WANT to know, What you have LEARNED... This sheet can be done during the lesson, as classwork, homework, or as a review sheet.You may also like:AP Environmental Science (APES) Unit 7.2 G