- Title: Just 2°C - Theme: Global Warming - Target age: Elementary school grades 3-4 - Content: Considers what happens if the Earth's temperature rises by 2°C. Thank you for viewing. I read this several times to write a book report. There are no noticeable stains or damage. I read it with my child, and it made me, an adult, think. How about it for summer reading book reports? Please understand that this is stored at home by an amateur, so only those who understand and agree, please.