Deletion of Greenhouse gas emissions in Kentucky

Comment: complete failure of .  First of all, an article having a single source is ''not'' a reason for deletion.  It might be if that were the only source in existence, but that is not the case here.  Secondly, being 30-years old has no basis in policy for discounting it.  Even if it is out of date (and you can only know that if you have found a more recent source, in which case your action should have been to incorporate that source, not nominate for deletion) Wikipedia is an ''encyclopaedia'' and should rightly include history of its topics.  That includes the state of play of greenhouse gases in Kentucky in 1990.  I am entirely sick of people deleting or overwriting information in Wikipedia because it is out of date when it should just have been rewritten to remove the appearance of being current per MOS:DATED
Stance: keep
Cited policy: Wikipedia:Articles for deletion (WP:BEFORE)