Peabody Library provides a brief overview on what makes a scholarly periodical different from a popular periodical. Created by Eli Moody, 2007.
Articles can be found by searching in the Library databases. You can try to search using the country name and environment as keywords. A better strategy is to search the databases after you have learned something about the country and its environmental issues, so that you know appropriate keywords to search (water pollution, biodiversity, etc.) Read the database description to help you decide which database is best to use.