User talk:69.63.42.20

February 2011
Welcome to Wikipedia. The recent edit you made to Carbon dioxide in Earth's atmosphere has been reverted, as it appears to be unconstructive. Use the sandbox for testing; if you believe the edit was constructive, ensure that you provide an informative edit summary. You may also wish to read the introduction to editing. Thank you.  Ron h jones (Talk) 22:28, 21 February 2011 (UTC)

Please do not add or significantly change content without citing verifiable and reliable sources. Before making any potentially controversial edits, it is recommended that you discuss them first on the article's talk page. Please review the guidelines at Citing sources and take this opportunity to add references to the article.  Ron h jones (Talk) 22:33, 21 February 2011 (UTC)