Who wrote the page and can you contact him/her?
I couldn't find an author for this site, but there are phone numbers and addresses for a company.
How detailed is the information?
The information is pretty detailed, but is biased. This tells you it might be a mask for advertising.
What opinions are expressed by the author?
There are many opinions on this site and the are all about the end of the world like that is what they want you to hear at this moment.
When was it produced?
I did a little research and found a post from March, 1994. That might mean they have been like, "oh, the world is ending!" before and it hasn't.
I don't think this site would be good for factual information, it is to opinionated and because it is selling things, I wouldn't trust it.