calculate	make a mathematical calculation or computation
determine	decide upon or fix definitely
extensive	large in spatial extent or range or scope or quantity
monitor	check, track, or observe by means of a receiver
Principles (principle)	a basic generalization that is accepted as true and that can be used as a basis for reasoning or conduct
routes (route)	an established line of travel or access
threat	something that is a source of danger
conserve	keep in safety and protect from harm, decay, loss, or destruction
bulky	of large size for its weight
conditions (condition)	a state at a particular time
conservationists (conservationist)	someone who works to protect the environment from destruction or pollution
imagination	the ability to form mental images of things or events
preserve	keep in safety and protect from harm, decay, loss, or destruction
survey	look over carefully or inspect
ancient	very old

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