Nice article, but it has largely been copied from this website http://listverse.com/2013/06/20/10-awesome-man-made-substances/

I'm new to Steemit, but I believe the purpose of this platform is to offer original content, or guide readers toward external sources with some commentary by the original poster. Copying another writer's material is just not proper.

I notice you post several articles a day. Please be sure you are not copying them from other websites, and if you use other sites, be sure to include the link so we can read them.

[I am an English teacher. You set off my teacher warning system.]