This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Weather map USDHEW Nov . en Weather maps depicting wind patterns at height of feet from November created by employees of the US Department of Health Education and Welfare epa gov cgi PDF Dockey PR PDF Thanksgiving Air Pollution Episode in the Eastern United States published by National Air Pollution Control Administration