Research on any topic may involve the use of primary and secondary sources. Primary sources provide a first-hand account or the raw, un-interpreted information. Secondary sources provide an interpretation or review of the information. Here are some examples of sources you could find for the topic of "Standing Rock and NoDAP."
Books
Encyclopedias or Dictionaries
Articles
Newspapers
Films
Government Documents
Many of these databases can help in finding scientific research as it relates to the topic of the environment and trash, waste, and garbage.
Part 1: House of Research Wrap-Up
Part 2: Personal Research Project Planning