i live in texas and put in my actual address, it worked just fine for me!
[Image: A tweet by FDT 🧚✨🥰 (@sophe_shapiro_) which says: "In case you mised it: Trump wants to mine for uranium in the Grand Canyon. This was banned eight years ago because it's incredibly harmful to not only the environment, but to Native tribes' water sources that are in close proximity to the canyon. This should make you angry." Caps changed for accessibility.]
I find it likely that emails from Arizona residents will be most impactful- perhaps specify in the subject line that you are a constituent/resident of Arizona, if you are? I see no reason for those of us outside or Arizona to not also send emails expressing our outrage.