Why were my questions deleted, when there were no explicit words, or content?

I just posted a link to a very good website showing environmental and health hazards....is it wrong? I was not even advertising, just out of goodwill to people, i posted it in various categories of beauty, health and environment because people should know about it, and now they have deleted my questions.......Can somebody help why? By the way i am not putting a link here as even this question might be deleted. The website was called the story of stuff project, in case you wish to see it.........