Words to Describe petrochemicals

How petrochemicals often is described ("________ petrochemicals")

• raw
• intermediate
• principal
• secondary
• organic
• nonrenewable
• certain
• saudi
• toxic
• most
• various
• many
• downstream
• cost
• primary
• shaggy
• volume
• important
• enough
• synthetic
• based
• intensive
• basic
• sophisticated
• key
• aromatic
• upstream
• tertiary
• valuable
• related
• mexican
• aliphatic
• cheap
• brazilian
• arabian
• other
• individual
• cyclic
• major
• complex
• industrial