Permissible and impermissible items of trade

Selling Islamic items

Q: I would like to start a business. Since I'm very passionate about Islam, I want to start a business with an Islamic theme to an Islamic target (I am thinking of selling Islamic books or Islamic wall arts).

My question is, is it haraam to earn money from this type of business?

P.s. It is not that I want to profit from the fact that I am Muslim, rather I feel a big passion for Islam and if there is something that I would like to spend most of my time with, then it is Islam.

Selling human hair

Q: A fertlizer called amino acid is prepared from the hair of humans, dog or any other animal. So we are planning to buy hair from salons and then sell to this industries who make amino acid from hair. Is it permissible?