Let me go look this up ill be right back okay....
When warm, wet air rises, it cools, and water vapor condenses out to form clouds. A cloud is made up of small drops of water or ice crystals, depending on its height and how cold is the surrounding air.
The movie was focused on the idea that our genetics will predestine people with success or failure. However, the main character showed that genetics is only a part that makes us physically, there are still other aspects that will determine other's faith, like their values.
The dead and decayed plants turn to coal after a million years under high pressure and heat of the earth.
And the petroleum is formed the same but with the dead animals in ocean bed to form petroleum