I write for Wikipedia because I believe that accurate and neutral information about climate change can help us make informed decisions to get us out of this mess. Also, people are wrong on the internet. I fear Wikipedia is getting inaccessible for a lay public, as us experts like to correct people that are wrong on the internet with fancy words.
I started editing around 2013 on the Dutch Wikipedia, mostly articles on physics, climate change and women in science. Around 2018 I switched to the English Wikipedia. I am a major contributor to Earth, climate change and sustainable energy. As a picture can say more than a thousand words, I've dedicated some time to improving climate change graphs. I started an effort to remove and help non-English communities remove climate denial, after a BBC journalist found widespread misinformation. I'm also involved in the effort to check whether old featured articles are still in line with the criteria.
Quick and ugly check to see if your writing is too difficult: The Hemingway App. A readability score (Flesch Kincaid Reading Ease) over >45 is fairly okay. Another rule of thumb: 4S: short words, short sentences, short paragraphs, short articles.