Letters to the Editor amplify your voice hundreds- or thousands-fold. And they do not have to be heavily technical—the strongest letters come from the heart. Most papers have a word limit of 150 words. And you can usually find a place on their web site to submit your letter. Most papers also discourage you from submitting your letter to multiple papers. You can use this to your advantage—if you don’t see your letter in print or hear from them after a few days, you can contact them and ask if they are going to print it. If not, you tell them, you will want to submit it elsewhere.
Here is a sample letter to the editor. At the bottom of this page is a link to additional resources. One of those is a fact sheet which you can use if you want to compose your own letter.
Additional resources, including the Fact Sheet, can be found here.