We gratefully acknowledge the following online resources:

National Centers for Environmental Information (NCEI) — https://www.ncei.noaa.gov/
Gaspar Zaldo — https://unsplash.com/@gasparzaldo
Jakob Owens — https://unsplash.com/@jakobowens1
Jeff Vanderspank — https://unsplash.com/@vanderspank
Samantha Deleo — https://unsplash.com/@sammycakesss
Armando Pacheco — https://unsplash.com/@apacheco77
Sydney Rae — https://unsplash.com/@srz
Modern Affliction — https://unsplash.com/@lemodernaffliction
Alan Bishop — https://unsplash.com/@ravenwolfab
Prateek Kayal — https://unsplash.com/@prateekkatyal
Hunter Brumels — https://unsplash.com/@hbrumels
Pixel Buddha — PixelBuddha.net
graphicheroco / Freepik — Tee mockup psd created by graphicheroco - www.freepik.com
GraphicBurger — https://graphicburger.com/
Annie Spratt — https://unsplash.com/@anniespratt
Thom Milkovic — https://unsplash.com/@thommilkovic
Mockaroon — https://unsplash.com/@mockaroon
Yan Ots — https://unsplash.com/@yanots