Polar Bear, Why Is Your World Melting?, , Albert Whitman & Company, Robert E. Wells,Children’s / Teenage social topics: Environment, sustainability and green issues,Children’s / Teenage: Social issues / topics, ice;global warming;wells of knowledge;scientist;future scientist;science for kids;robert e wells;greenhouse gas;grade school;elementary school;education;greenhouse effect;arctic;science;environment;pollution;earth day;conservation;sea ice,, Wells of Knowledge Science Series, United States, en-UShttps://www.albertwhitman.comice;global warming;wells of knowledge;scientist;future scientist;science for kids;robert e wells;greenhouse gas;grade school;elementary school;education;greenhouse effect;arctic;science;environment;pollution;earth day;conservation;sea ice, [BLURB],[CITY],,books, ebooks, biblet, Book2look