Silly question about why we banned chemical warfare?

[bmaup1]

I got a bit of a silly question. Why exactly did we ban chemicals in warfare. I mean, I read Agent Orange and that whole jazz, but the entire concept of inhuman weapons in war seems a bit-redundant? I m NOT saying i support or want chemical weapons, just a clarification of what makes them inhuman, prevented, and its punishment if used.

[bmaup1]

You're really bad at this.

At the whole asking stuff on the forums? Yeah im not very good at getting my point or questions across. Sorry if its confusing.

[bmaup1]

Google "World War I"

Thanks it makes more sense now! Just was a bit confused.