Tear gas is read as an atmosphere that makes it hard to see or breathe clearly, and as emotion stirred up by force in a tense crowd.
Where in your waking life have you met something like this lately?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.