It is the interest one takes in books that makes a library. And if a library have interest it is; if not, it isn't.

Discipline is doing the right thing, for the right reason, at the right time

Fertilizers are chemicals added to plants to help them grow. Important elements in fertilizers include nitrogen, phosphorus and potassium. Manure (animal waste) is also used as a fertilizer.

Plant matter found at the bottom of areas with water such as swamps can eventually turn into coal due to a process called metamorphosis (changing form).