You can approach environmental justice from a variety of perspectives--including those from the humanities, social sciences, and hard sciences.
Let's say you want to find literature on environmental justice from a psychology perspective; specically:
You're interested in the role of environmental activism in emotional healing, particularly for those communities most affected by environmental trauma.
Step 1: Break up this idea into two or three main concepts. Ignore extraneous words.
Step 2: Conduct an initial search with these words, and quickly scan the results.
Step 3: Using information from your initial search, add synonyms, acronyms, and variant spellings.
You want to write about environmental justice in a way that leverages psychological principles.
"science communication" AND "environmental psychology"