User talk:Jan Twente

May 2018
Hello, I'm DMacks. I noticed that you made one or more changes to an article, Green chemistry‎, but you didn't provide a reliable source. It's been removed and archived in the page history for now, but if you'd like to include a citation and re-add it, please do so! If you need guidance on referencing, please see the referencing for beginners tutorial, or if you think I made a mistake, you can leave me a message on my talk page. Thank you. DMacks (talk) 15:22, 9 May 2018 (UTC)

Please refrain from making unconstructive edits to Wikipedia, as you did with this edit to Green chemistry. Your edits appear to constitute vandalism and have been reverted or removed. If you would like to experiment, please use the sandbox. Repeated vandalism can result in the loss of editing privileges. Thank you. Lakeside Out!-LakesideMinersClick Here To Talk To Me! 15:34, 9 May 2018 (UTC)