What two categories can the environment be divided into?

How to make a worm bed? What the differences between pituitary gland and pineal glands? How many cups are in 90 milliliter? How do culture affect moral development? Who invented electromagnetism? What is the rapid mass movement of rock down a cliff? How does the nature of the metallic bond explain the observation that most metals can be drawn into wire? What is the sharing of electrons in hydrocarbons? In which of these places does peristalsis not occur? What is the term for inability to resist impulses of stealing? Why do you think that nitrogen gas is the composition of dry air? What will happen to a plant's food production if it is kept under green colored light for an extended period of time? Where do most earthquakes occur in the world? What do reducing agents do during redox reactions? What would humans if the sun went out? Are junction boxes normally used in wiring the first floor? Is Mount Vesuvius constructive or destructive? What PPE should be used when mixing plaster? Why is fossil fuels worse then hydroelectric power? What are the advantages of live sawing?

What two categories can the environment be divided into?